Gaya APA

Learning, M, O., WIDODO, M, P. (1996). Membangun loyalitas pelanggan= Creating customer loyalty . Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Learning, Manchester, Open., WIDODO, M., Prihminto. "Membangun loyalitas pelanggan= Creating customer loyalty". Jakarta: Gramedia Pustaka Utama, 1996. Text.