Gaya APA
Ayer, Aj. (1951).
The Foundations of empirical knowledge .
New York:
Macmillan.
Gaya Chicago
Ayer, Aj.
The Foundations of empirical knowledge.
New York:
Macmillan,
1951.
Text.
Gaya MLA
Ayer, Aj.
The Foundations of empirical knowledge.
New York:
Macmillan,
1951.
Text.
Gaya Turabian
Ayer, Aj.
The Foundations of empirical knowledge.
New York:
Macmillan,
1951.
Print.