APA Style
Asimov, Isaac. (1989).
Second Foundation (Cet. 15).
New York:
Ballantine Books.
Chicago Style
Asimov, Isaac.
Second Foundation.
Cet. 15
New York:
Ballantine Books,
1989.
Text.
MLA Style
Asimov, Isaac.
Second Foundation.
Cet. 15
New York:
Ballantine Books,
1989.
Text.
Turabian Style
Asimov, Isaac.
Second Foundation.
Cet. 15
New York:
Ballantine Books,
1989.
Print.