Gaya APA
Copi, M. Irving. (1978).
Introduction to logic .
New York:
Macilan Pubishing.
Gaya Chicago
Copi, M. Irving.
Introduction to logic.
New York:
Macilan Pubishing,
1978.
Text.
Gaya MLA
Copi, M. Irving.
Introduction to logic.
New York:
Macilan Pubishing,
1978.
Text.
Gaya Turabian
Copi, M. Irving.
Introduction to logic.
New York:
Macilan Pubishing,
1978.
Print.