Gaya APA
Ayer, Aj. (1956).
The Problem of knowledge .
New York:
Penguin Books.
Gaya Chicago
Ayer, Aj.
The Problem of knowledge.
New York:
Penguin Books,
1956.
Text.
Gaya MLA
Ayer, Aj.
The Problem of knowledge.
New York:
Penguin Books,
1956.
Text.
Gaya Turabian
Ayer, Aj.
The Problem of knowledge.
New York:
Penguin Books,
1956.
Print.