APA-ийн эшлэл(7 дахь хэвлэлт)

Gill, P. (2007). Business process outsourcing and call centre. Srishti Book Distributor.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Gill, Priya. Business Process Outsourcing and Call Centre. New Delhi: Srishti Book Distributor, 2007.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Gill, Priya. Business Process Outsourcing and Call Centre. Srishti Book Distributor, 2007.