APA or MLA?

Both APA and MLA are referencing styles: they explain in details how to deal with citations and references in writing.

While APA treats a larger number of aspects regarding style, like structure of the page, footnotes, abstract, etc., MLA is more concentrated on referencing and citing, telling you how to write a reference of ANY type of writing available in the world!!

Instinctively I prefer APA, it looks clearer and easier for one's eyes!

Some basic differences concerning the styles in referencing a source are:

-APA uses italics for the title, while MLA prefers underlining it.
-APA tends to use the initial for the name of the author, while MLA tends to prefer using the complete firstname.
-APA puts the year of publication right after the author's name, while MLA puts it at the end of the reference.

Anyway, these are pure matters of choice: no style is better than the other. The important thing is once you've choosen one, you have to keep using it.

Without realizing it, in my BA thesis I used APA style, which my Professor recommended me.