Gaya APA

Widyantoro, A. et al (2008). Effective Communication : An Integrated Course of English for Vocational High School . Jakarta: PT. JePe Press Media Utama.

Gaya MLA

Widyantoro, Agus. et al. "Effective Communication : An Integrated Course of English for Vocational High School". Jakarta: PT. JePe Press Media Utama, 2008. Text.