APA Style
AYER, A. J.. (1956).
The Problem of Knowledge .
London:
Penguin Books.
Chicago Style
AYER, A. J..
The Problem of Knowledge.
London:
Penguin Books,
1956.
Text.
MLA Style
AYER, A. J..
The Problem of Knowledge.
London:
Penguin Books,
1956.
Text.
Turabian Style
AYER, A. J..
The Problem of Knowledge.
London:
Penguin Books,
1956.
Print.