Gaya APA
Ayer, A. J. (Alfred Jules). (1955).
the problem of knowledge .
England:
Penguin Books.
Gaya Chicago
Ayer, A. J. (Alfred Jules).
the problem of knowledge.
England:
Penguin Books,
1955.
Text.
Gaya MLA
Ayer, A. J. (Alfred Jules).
the problem of knowledge.
England:
Penguin Books,
1955.
Text.
Gaya Turabian
Ayer, A. J. (Alfred Jules).
the problem of knowledge.
England:
Penguin Books,
1955.
Print.