Gaya APA

Robith, A, S, &, S, S, P. (1989). A Practical English Conversation (1989) . Surabaya: Indah.

Gaya MLA

Robith, A., Shomad, &, Syamsul, Senoprojo, Ps.. "A Practical English Conversation (1989)". Surabaya: Indah, 1989. Printed Book.