If the two authors are the same person? That’s not two authors. That’s one author with an ego. Cite them only once. You’re welcome.
So next time you’re standing in the checkout line with a book by Johnson and Tsai, you’ll feel a quiet, smug confidence. You know the dance: “and” in the sentence, “&” in the parentheses, and full names reversed in the Works Cited. You’re not just writing—you’re orchestrating a polite, accurate love letter to two brilliant minds.
And if you mess up? Just blame the squirrel. They’re notoriously bad at formatting.