APA Style
JEFFREY, Richard C.. (1988).
Formal logic .
Singapore:
by South-Western Publishing co.
Chicago Style
JEFFREY, Richard C..
Formal logic.
Singapore:
by South-Western Publishing co,
1988.
Text.
MLA Style
JEFFREY, Richard C..
Formal logic.
Singapore:
by South-Western Publishing co,
1988.
Text.
Turabian Style
JEFFREY, Richard C..
Formal logic.
Singapore:
by South-Western Publishing co,
1988.
Print.