Gaya APA
Working Papers. (1985).
Massachusetts:
KENT PUBLISHING.
Gaya Chicago
Working Papers.
3rd ed..
Massachusetts:
KENT PUBLISHING,
1985.
.
Gaya MLA
Working Papers.
3rd ed..
Massachusetts:
KENT PUBLISHING,
1985.
.
Gaya Turabian
Working Papers.
Massachusetts:
KENT PUBLISHING,
1985.
.