Gaya APA
Elfenbein, Julien. (1967).
Business letters and communications .
New York:
Alexander Hamilton Institute.
Gaya Chicago
Elfenbein, Julien.
Business letters and communications.
New York:
Alexander Hamilton Institute,
1967.
Tesis.
Gaya MLA
Elfenbein, Julien.
Business letters and communications.
New York:
Alexander Hamilton Institute,
1967.
Tesis.
Gaya Turabian
Elfenbein, Julien.
Business letters and communications.
New York:
Alexander Hamilton Institute,
1967.
Tesis.