Gaya APA
Stull, J., W., B., J., B. (1983).
BUSINESS COMMUNICATION STRATEGIES AND SOLUTIONS .
USA:
MC Graw-Hill Book Company.
Gaya MLA
Stull, John, W, Baird,, James, B.
"BUSINESS COMMUNICATION STRATEGIES AND SOLUTIONS".
USA:
MC Graw-Hill Book Company,
1983.
Buku Inti.