Gaya APA

Wiese, J., Melton, H, K. (2002). The Spy's Guide to Secret Codes and Ciphers . New York: Scholastic Inc.

Gaya MLA

Wiese, Jim., Melton, H., Keith. "The Spy's Guide to Secret Codes and Ciphers". New York: Scholastic Inc, 2002. Textbook.