Gaya APA
Historical Studies Today. (1972).
Amerika:
George J.McLeod Limited.
Gaya Chicago
Historical Studies Today.
.
Amerika:
George J.McLeod Limited,
1972.
.
Gaya MLA
Historical Studies Today.
.
Amerika:
George J.McLeod Limited,
1972.
.
Gaya Turabian
Historical Studies Today.
Amerika:
George J.McLeod Limited,
1972.
.