Roberts-Phelps Graham. (2005). Guide to Telephone Tactics (1.). VIVA Books Private Limited.
Chicago-čujuhus (17. p.)Roberts-Phelps Graham. Guide to Telephone Tactics. 1. New Delhi: VIVA Books Private Limited, 2005.
MLA-čujuhus (9. p.)Roberts-Phelps Graham. Guide to Telephone Tactics. 1. VIVA Books Private Limited, 2005.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.