Gaya APA
Copi, Irving M. (1982).
Introduction to logic (6).
New York:
Macmillan Pub.
Gaya Chicago
Copi, Irving M.
Introduction to logic.
6
New York:
Macmillan Pub,
1982.
Buku.
Gaya MLA
Copi, Irving M.
Introduction to logic.
6
New York:
Macmillan Pub,
1982.
Buku.
Gaya Turabian
Copi, Irving M.
Introduction to logic.
6
New York:
Macmillan Pub,
1982.
Buku.