When you're citing a source with two authors, it's not as complicated as it sounds. You simply include both authors' last names in the in-text citation, separated by "and" - easy peasy!
For example, if you're citing a study by John Smith and Jane Doe, your in-text citation would look like this: (Smith and Doe 23). See, not so hard, right? The page number is included, so your readers can find the exact spot where you got your info.
But what if the authors' names are already mentioned in the sentence? Well, in that case, you can just include the page number in the in-text citation, like this: (23). It's all about being clear and concise, so your readers don't get confused.