Gaya APA
AURNER,Robert R.. (1970).
Effective English For Business Communication (ed.6).
New York:
South - western publishing company.
Gaya Chicago
AURNER,Robert R..
Effective English For Business Communication.
ed.6
New York:
South - western publishing company,
1970.
Teks.
Gaya MLA
AURNER,Robert R..
Effective English For Business Communication.
ed.6
New York:
South - western publishing company,
1970.
Teks.
Gaya Turabian
AURNER,Robert R..
Effective English For Business Communication.
ed.6
New York:
South - western publishing company,
1970.
Teks.