APA (7th ed.) Citation

Helprin, M., & Van Allsburg, C. (1989). Swan lake. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Helprin, Mark, and Chris Van Allsburg. Swan Lake. Boston: Houghton Mifflin, 1989.

MLA (8th ed.) Citation

Helprin, Mark, and Chris Van Allsburg. Swan Lake. Houghton Mifflin, 1989.

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