Penggayaan APA
HEER, Friedrich. (1961).
The Medieval World .
New York:
The New American Library.
Chicago Style
HEER, Friedrich.
The Medieval World.
New York:
The New American Library,
1961.
Text.
MLA Style
HEER, Friedrich.
The Medieval World.
New York:
The New American Library,
1961.
Text.
Turabian Style
HEER, Friedrich.
The Medieval World.
New York:
The New American Library,
1961.
Print.