Ian Hoke reitierates, "a successful argument in an AP essay requires extensive evidence" (2).
"MLA-style in-text citations include the author's name and exact page reference" (Palmquist 262). However, if as in the example above, the author of the source is clearly identified in the body, then only the page number appears at the end of the sentence in the quotation
Attributions and signal phrases
In the example above, the verb which serves to attribute the source is "reiterates". Note that it is in the present tense which is recommended in MLA style. Some (but by no means all) attributions include:
Palmquist, Mike. The Bedford Researcher, 5th ed., Bedford/St. Martin's, 2015.