Gaya APA
Marks, Ronald B. (1994).
Personal selling : an interactive approach .
Boston:
Prentice Hall.
Gaya Chicago
Marks, Ronald B.
Personal selling : an interactive approach.
Boston:
Prentice Hall,
1994.
Buku.
Gaya MLA
Marks, Ronald B.
Personal selling : an interactive approach.
Boston:
Prentice Hall,
1994.
Buku.
Gaya Turabian
Marks, Ronald B.
Personal selling : an interactive approach.
Boston:
Prentice Hall,
1994.
Buku.