Gaya APA
Giblin, L., Helly, P, Y, D.
(2001).
Skill With People
.
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
Giblin, Les., Helly, Purnomo, Y, Dwi.
"Skill With People".
Jakarta:
Gramedia Pustaka Utama,
2001.
Text.