Gaya APA
Harahap, A. Effendi. (1984).
Grammar and Conversation .
Semarang:
Effendiharahap Publishing.
Gaya Chicago
Harahap, A. Effendi.
Grammar and Conversation.
Semarang:
Effendiharahap Publishing,
1984.
Text.
Gaya MLA
Harahap, A. Effendi.
Grammar and Conversation.
Semarang:
Effendiharahap Publishing,
1984.
Text.
Gaya Turabian
Harahap, A. Effendi.
Grammar and Conversation.
Semarang:
Effendiharahap Publishing,
1984.
Print.