APA (7th ed.) Citation

Perry, A. (2018). Twenty-one days: A Daniel Pitt novel (First Edition.). Ballantine Books.

Chicago Style (17th ed.) Citation

Perry, Anne. Twenty-one Days: A Daniel Pitt Novel. First Edition. New York: Ballantine Books, 2018.

MLA (8th ed.) Citation

Perry, Anne. Twenty-one Days: A Daniel Pitt Novel. First Edition. Ballantine Books, 2018.

Warning: These citations may not always be 100% accurate.