Gaya APA
Ayer, A.J. (1956).
The problem of knowledge .
New Zealand:
Penguin Books Ltd.
Gaya Chicago
Ayer, A.J.
The problem of knowledge.
New Zealand:
Penguin Books Ltd,
1956.
Text.
Gaya MLA
Ayer, A.J.
The problem of knowledge.
New Zealand:
Penguin Books Ltd,
1956.
Text.
Gaya Turabian
Ayer, A.J.
The problem of knowledge.
New Zealand:
Penguin Books Ltd,
1956.
Print.