APA aipamena

Beatty, K., Hopkins, A., & Potter, J. (2007). Secret Codes. England: Pearson Education Ltd.

Chicago Style aipamena

Beatty, Ken, Andy Hopkins, và Jocelyn Potter. Secret Codes. England: Pearson Education Ltd, 2007.

MLA aipamena

Beatty, Ken, Andy Hopkins, và Jocelyn Potter. Secret Codes. England: Pearson Education Ltd, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.