Gaya APA
Russell, F, A. (1985).
Text Book Of Salesmanship Frederic A. Russell, Frank H. Beach, Richard H. Buskirk (Second).
New York:
McGraw-Hii.
Gaya MLA
Russell, Frederic, A..
"Text Book Of Salesmanship Frederic A. Russell, Frank H. Beach, Richard H. Buskirk".
Second
New York:
McGraw-Hii,
1985.
FAKULTAS EKONOMI.