Gaya APA
Heer, Friedrich. (1961).
The Medieval World: Europe 1100-1350 .
New York:
The New American Library.
Gaya Chicago
Heer, Friedrich.
The Medieval World: Europe 1100-1350.
New York:
The New American Library,
1961.
Text.
Gaya MLA
Heer, Friedrich.
The Medieval World: Europe 1100-1350.
New York:
The New American Library,
1961.
Text.
Gaya Turabian
Heer, Friedrich.
The Medieval World: Europe 1100-1350.
New York:
The New American Library,
1961.
Print.