Gaya APA
HIGGINS, J, M.
(1982).
HUMAN RELATIONS CONCEPTS AND SKILLS
(
EDISI 1)
.
USA:
RANDOM HOUSE.
Gaya MLA
HIGGINS, JAMES, M..
"HUMAN RELATIONS CONCEPTS AND SKILLS".
EDISI 1
USA:
RANDOM HOUSE,
1982.
Book.