Gaya APA
Cooper, Donald R.. (1995).
BUSINESS RESEACRH METHODS (5).
:
.
Gaya Chicago
Cooper, Donald R..
BUSINESS RESEACRH METHODS.
5
:
,
1995.
Text.
Gaya MLA
Cooper, Donald R..
BUSINESS RESEACRH METHODS.
5
:
,
1995.
Text.
Gaya Turabian
Cooper, Donald R..
BUSINESS RESEACRH METHODS.
5
:
,
1995.
Print.