Dyfyniad APA

Roberts-Phelps, G. (2004). The concise guide to telephone tactics. Thorogood.

Dyfyniad Arddull Chicago

Roberts-Phelps, Graham. The Concise Guide to Telephone Tactics. London: Thorogood, 2004.

Dyfyniad MLA

Roberts-Phelps, Graham. The Concise Guide to Telephone Tactics. Thorogood, 2004.

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