Gaya APA

Developing Skills. (1992). Jakata: [s.n.].

Gaya Chicago

Developing Skills. . Jakata: [s.n.], 1992. Text.

Gaya MLA

Developing Skills. . Jakata: [s.n.], 1992. Text.

Gaya Turabian

Developing Skills. Jakata: [s.n.], 1992. Print.