Penggayaan APA
Purtill, Richard L. (1979).
Logic .
New York:
Harper & Row.
Chicago Style
Purtill, Richard L.
Logic.
New York:
Harper & Row,
1979.
Buku.
MLA Style
Purtill, Richard L.
Logic.
New York:
Harper & Row,
1979.
Buku.
Turabian Style
Purtill, Richard L.
Logic.
New York:
Harper & Row,
1979.
Buku.