Gaya APA
Roth, A, J.
(1982).
The research paper : Process,form and content
(
ed.4)
.
Belmont:
Wadsworth.
Gaya MLA
Roth, Audrey, J.
"The research paper : Process,form and content".
ed.4
Belmont:
Wadsworth,
1982.
Buku Tercetak.