Gaya APA
Weissberg, R., Buker, S. (1990).
Writing up Research/ Robert Weissberg (Edisi revisi).
United States of America:
Prentice Hall Inc.
Gaya MLA
Weissberg, Robert., Buker, Suzanne.
"Writing up Research/ Robert Weissberg".
Edisi revisi
United States of America:
Prentice Hall Inc,
1990.
Text.