APA (7th ed.) Citation

Cameron, W. B. (2015). A dog's purpose: Ellie's story. Macmillan Children's Books.

Chicago Style (17th ed.) Citation

Cameron, W. Bruce. A Dog's Purpose: Ellie's Story. London: Macmillan Children's Books, 2015.

MLA (9th ed.) Citation

Cameron, W. Bruce. A Dog's Purpose: Ellie's Story. Macmillan Children's Books, 2015.

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