Gaya APA
KING, F., CREE, D, A.
(1986).
ENGLISH BUSINESS LETTERS : NEW EDITION
(
ED. 2)
.
SINGAPORE:
LOGMAN.
Gaya MLA
KING, F.W.., CREE, D., ANN.
"ENGLISH BUSINESS LETTERS : NEW EDITION".
ED. 2
SINGAPORE:
LOGMAN,
1986.
Prodi D3 Kesekretariatan.