Gaya APA

Armistead, C, G., Clark, G. (2002). Customer Service and Support (Layanan dan Dukungan kepada Pelanggan) . PT Elex Media: Longman Group UK.

Gaya MLA

Armistead, Colin, G.., Clark, Graham. "Customer Service and Support (Layanan dan Dukungan kepada Pelanggan)". PT Elex Media: Longman Group UK, 2002. Texts.