Gaya APA
Egan, G. ().
The Skilled Helper : A Systematic Approach To Effective Helping (Ed. Ke-3).
California:
Pasific Grow.
Gaya MLA
Egan, Gerard.
"The Skilled Helper : A Systematic Approach To Effective Helping".
Ed. Ke-3
California:
Pasific Grow,
.
Text.