APA (7th ed.) Citation

Sachar, L., & Wummer, A. (2000). A magic crystal? Random House.

Chicago Style (17th ed.) Citation

Sachar, Louis, and Amy Wummer. A Magic Crystal? New York: Random House, 2000.

MLA (8th ed.) Citation

Sachar, Louis, and Amy Wummer. A Magic Crystal? Random House, 2000.

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