Gaya APA
Birch, paul. (1996).
Busines Creativity (ed.1).
Medan:
selemba.
Gaya Chicago
Birch, paul.
Busines Creativity.
ed.1
Medan:
selemba,
1996.
HUKUM.
Gaya MLA
Birch, paul.
Busines Creativity.
ed.1
Medan:
selemba,
1996.
HUKUM.
Gaya Turabian
Birch, paul.
Busines Creativity.
ed.1
Medan:
selemba,
1996.
HUKUM.