Gaya APA
Copi, Irving M. (1968).
Introduction to Logic .
New York:
Thwe Macmillan Company.
Gaya Chicago
Copi, Irving M.
Introduction to Logic.
New York:
Thwe Macmillan Company,
1968.
Text.
Gaya MLA
Copi, Irving M.
Introduction to Logic.
New York:
Thwe Macmillan Company,
1968.
Text.
Gaya Turabian
Copi, Irving M.
Introduction to Logic.
New York:
Thwe Macmillan Company,
1968.
Print.