Gaya APA
Metodologi research. (1989).
Yogyakarta:
Andi Offset.
Gaya Chicago
Metodologi research.
.
Yogyakarta:
Andi Offset,
1989.
Text.
Gaya MLA
Metodologi research.
.
Yogyakarta:
Andi Offset,
1989.
Text.
Gaya Turabian
Metodologi research.
Yogyakarta:
Andi Offset,
1989.
Print.