Roberts-Phelps Graham. (2005). Guide to Telephone Tactics (1.). VIVA Books Private Limited.
Lua i Stíl Chicago (17ú heag.)Roberts-Phelps Graham. Guide to Telephone Tactics. 1. New Delhi: VIVA Books Private Limited, 2005.
Lua MLA (9ú heag.)Roberts-Phelps Graham. Guide to Telephone Tactics. 1. VIVA Books Private Limited, 2005.
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