APA (7th ed.) Citation

Webb, M., & Schwartzman, A. (2000). It's a great wall! Watson-Guptill.

Chicago Style (17th ed.) Citation

Webb, Michael, and Arnold Schwartzman. It's a Great Wall! New York: Watson-Guptill, 2000.

MLA (9th ed.) Citation

Webb, Michael, and Arnold Schwartzman. It's a Great Wall! Watson-Guptill, 2000.