Gaya APA
KIRKPATRICK, C, A.
(1961).
SALESMANSHIP
(
3RD ED.)
.
Ohio:
THE GOODHEART-WILLCOX, South Hollan.
Gaya MLA
KIRKPATRICK, CHARLES, ATKINSON.
"SALESMANSHIP".
3RD ED.
Ohio:
THE GOODHEART-WILLCOX, South Hollan,
1961.
Textbook.