Dyfyniad APA

Phillips, B. (2009). Locksmith and security professionals' exam study guide. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Phillips, Bill. Locksmith and Security Professionals' Exam Study Guide. New York: McGraw-Hill, 2009.

Dyfyniad MLA

Phillips, Bill. Locksmith and Security Professionals' Exam Study Guide. New York: McGraw-Hill, 2009.

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