APA (7th ed.) Citation

Stine, R. L. (2017). I am Slappy's evil twin. Scholastic Inc..

Chicago Style (17th ed.) Citation

Stine, R. L. I Am Slappy's Evil Twin. New York, NY: Scholastic Inc., 2017.

MLA (8th ed.) Citation

Stine, R. L. I Am Slappy's Evil Twin. Scholastic Inc., 2017.

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