Penggayaan APA
Index. (1987).
New York:
Grolier Incorporated.
Chicago Style
Index.
Cet.1.
New York:
Grolier Incorporated,
1987.
Text.
MLA Style
Index.
Cet.1.
New York:
Grolier Incorporated,
1987.
Text.
Turabian Style
Index.
New York:
Grolier Incorporated,
1987.
Print.