Gaya APA
Roy, Ewell Paul. (1980).
Cooperatives : development, principles and management, 4th ed. (4th ed.).
Louisiana:
s.n..
Gaya Chicago
Roy, Ewell Paul.
Cooperatives : development, principles and management, 4th ed..
4th ed.
Louisiana:
s.n.,
1980.
Text.
Gaya MLA
Roy, Ewell Paul.
Cooperatives : development, principles and management, 4th ed..
4th ed.
Louisiana:
s.n.,
1980.
Text.
Gaya Turabian
Roy, Ewell Paul.
Cooperatives : development, principles and management, 4th ed..
4th ed.
Louisiana:
s.n.,
1980.
Print.