Gaya APA
Dumais, L, W.
(1988).
Writing in English
.
Jakarta:
P2LPTK Dirjen Dikti Depdikbud.
Gaya MLA
Dumais, L.A., Wullur.
"Writing in English".
Jakarta:
P2LPTK Dirjen Dikti Depdikbud,
1988.
Text.