Gaya APA

ISMAIL, R, T. (1994). A Guide to letter writing for specific purpose / Rose Tunku Ismail (Cet. 1). : Pusat Pengajian Luar Kampus UGM.

Gaya MLA

ISMAIL, Rose, Tunku. "A Guide to letter writing for specific purpose / Rose Tunku Ismail". Cet. 1 : Pusat Pengajian Luar Kampus UGM, 1994. Referensi.