Gaya APA
Sigit, Soehardi. (1987).
Marketing praktis (text).
Yogyakarta:
Liberty.
Gaya Chicago
Sigit, Soehardi.
Marketing praktis.
text
Yogyakarta:
Liberty,
1987.
.
Gaya MLA
Sigit, Soehardi.
Marketing praktis.
text
Yogyakarta:
Liberty,
1987.
.
Gaya Turabian
Sigit, Soehardi.
Marketing praktis.
text
Yogyakarta:
Liberty,
1987.
.