Gaya APA
Copi, Irving M.. (1978).
Introduction to logic (5th Ed.).
New York:
Macmillan Publ..
Gaya Chicago
Copi, Irving M..
Introduction to logic.
5th Ed.
New York:
Macmillan Publ.,
1978.
Text.
Gaya MLA
Copi, Irving M..
Introduction to logic.
5th Ed.
New York:
Macmillan Publ.,
1978.
Text.
Gaya Turabian
Copi, Irving M..
Introduction to logic.
5th Ed.
New York:
Macmillan Publ.,
1978.
Print.