Reference , originating in Latin refĕrens , is a term linked to the verb refer . This word is used to name the expression about something and the link or similarity of something with another object.

Bibliographic On the other hand, it is an adjective that indicates what has to do with the bibliography (the science dedicated to describing publications and referencing texts).
It is known as bibliographic reference , therefore, to the series of information that makes it possible to identify a book or other kind of publication, or a fragment thereof. The purpose is that the reader, by finding a bibliographic reference, can locate the mentioned publication in a simple way.
The data that should be included in a bibliographic reference usually appear on the cover or on the first page of the work, such as the name of the person who created the contents and the editor, the date of publication and the title. Other information can be found on the credits or rights page, with legal information and the so-called International Standard Book Number (whose acronym is ISBN) .
This cited ISBN can determine that it is a single-type bookmark, which is used for books and is currently made up of a total of thirteen digits, replacing the ten that were previously used. Ten digits that were divided into four clearly defined blocks that referred to what the country code was or the language of origin in which the book, the publisher, the article number and finally the relevant control digit was written.
However, we cannot ignore the fact that in the case of what are newspapers or magazines, that is, of periodical publications of different types, instead of the mentioned ISBN, what is used to proceed with the classification is the so-called identifier ISSN This, abbreviation of International Standard Number of Serial Publications, is established that it should be incorporated in what is the upper right of the cover of the issues that belong to the relevant collection.
There are several modalities to follow when adding a bibliographic reference in a writing. The most common is to start with the author's name in capital letters, continue with the italic mention of the title of the publication and then, successively, with the edition, place, editorial, year of publication, notes and Name and collection number. The format would be as follows:
AUTHOR'S LAST NAME, name. Publication Title. Issue Number Place: publishing company, year. Number of pages (Collection; collection number). Notes. ISBN.
In the same way, and taking into account the important role that the Internet already plays in our lives when accessing any type of information, we also find the fact that the bibliographic reference of a page can also be carried out Web.
In this case, when a person is going to make clear the use of a Web space, what they should include as a reference is the sum of several elements: author, title of said web page and the date of revision or update.