APA Style (7th ed.)
The intention behind providing a page or paragraph number in an in-text citation is to direct your reader to the specific location within a resource of the quoted or paraphrased text (e.g., (Lastname, year, p. X). If you are working with a source that doesn't have page or paragraph numbers, consider how you can direct your reader via your in-text citation to the location of the information within the resource, such as providing a chapter title and section heading or a table number. Please see Citing Specific Parts of a Source (from APA Style's website) for more information. For example references with citations, please see How do I reference a book in APA Style? or How do I reference a chapter of an edited book in APA Style?.