Gaya APA

F.W.King, ., Cree, D. (1991). English business letters: commercial, corespondence for foreign students (New Edition). Singapura: Logman Singapore Publisher Ptc Ltd.

Gaya MLA

F.W.King, ., Cree, D.Ann. "English business letters: commercial, corespondence for foreign students". New Edition Singapura: Logman Singapore Publisher Ptc Ltd, 1991. Text.