Q. How do I do in text citations in MLA format with no page number?

When a source has no page numbers, in-text citations for it can just include the author's name.  The author-only in-text citation can be placed in parentheses or be part of the sentence in which the source is quoted or paraphrased.  Here are some examples:

Example 1: Kurosawa's Rashomon was one of the first Japanese films to attract a Western audience.

Example 2: The utilitarianism of the Victorians "attempted to reduce decision-making about human actions to a 'felicific calculus'" (Everett).

You can read more about these rules in COM Library's Cite MLA Style guide.  Select the In-Text Citations page and scroll down to the box titled "Page Number Unknown, With or Without Known Author".