APA (7th ed.) Citation

Bedford, D., St Leger, H., & Vaughan, B. (2015). I love my grandma. Parragon Book.

Chicago Style (17th ed.) Citation

Bedford, David, Henry St Leger, and Brenna Vaughan. I Love My Grandma. Bath: Parragon Book, 2015.

MLA (9th ed.) Citation

Bedford, David, et al. I Love My Grandma. Parragon Book, 2015.