While writing & citing, nearly every reference to a source has two parts:
1. The indication in the body of your paper that you’re referring to a source, and
2. The publication information a reader needs to track that source down later.

The two citation styles used discussed here—MLA, APA, and these are called in-text style.

MLA Type Format:
In MLA format, references to a source should mention the author’s name and the exact page you’re using directly in your paragraph. You would give the page number in parentheses, directly after you quote or paraphrase the source. You may give the author’s name in the parentheses, too, or include it in your sentence.

Here are two very simple examples of how this might look:

In the Nicomachean Ethics, Aristotle suggests that such people “think happiness is some plain or obvious thing, like pleasure, wealth, or honour” (2).

The Nicomachean Ethics suggests that such people “think happiness is some plain or obvious thing, like pleasure, wealth, or honour” (Aristotle 2).
In either case, the reader will know to look for “Aristotle” in your Works Cited to find the rest of the information about your source.

APA Type Format:
In APA format, references to a source should mention the author’s name and give the publication year of the source. You would normally give the year in parentheses. You may give the author’s name in the parentheses, too, or include it in your sentence. (If you include the name in your sentence, give the year directly after; if you put the name and year in parentheses, put them at the end of the sentence where you quote or paraphrase the source.)

Here are two very simple examples of how this might look:

Geller (2001) found that women who shop with their mothers spend twice as much on a dress as those who shop with friends.

Studies suggest that women who shop with their mothers spend twice as much on a dress as those who shop with friends (Geller, 2001).

__________________
Thanks & Regards
Faseeh