Gaya APA
Ayer, A. J.. (1956).
The Problem of Knowledge .
England:
Penguin Books.
Gaya Chicago
Ayer, A. J..
The Problem of Knowledge.
England:
Penguin Books,
1956.
Text.
Gaya MLA
Ayer, A. J..
The Problem of Knowledge.
England:
Penguin Books,
1956.
Text.
Gaya Turabian
Ayer, A. J..
The Problem of Knowledge.
England:
Penguin Books,
1956.
Print.