Gaya APA

Interpersonal Skill. (2007). Bogor: [s.n.].

Gaya Chicago

Interpersonal Skill. 4. Bogor: [s.n.], 2007. Text.

Gaya MLA

Interpersonal Skill. 4. Bogor: [s.n.], 2007. Text.

Gaya Turabian

Interpersonal Skill. Bogor: [s.n.], 2007. Print.