Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.