Gaya APA
Ayer, A.J. (1984).
The Problem of knowledge .
New York:
Penguin Books.
Gaya Chicago
Ayer, A.J.
The Problem of knowledge.
New York:
Penguin Books,
1984.
Buku.
Gaya MLA
Ayer, A.J.
The Problem of knowledge.
New York:
Penguin Books,
1984.
Buku.
Gaya Turabian
Ayer, A.J.
The Problem of knowledge.
New York:
Penguin Books,
1984.
Buku.