Gaya APA

Lee, C. et al (2017). 21 St Century Communication : Listening, Speaking, And Critical Thinking / Christien Lee . Amerika Serikat: Sherrise Roehr.

Gaya MLA

Lee, Christien. et al. "21 St Century Communication : Listening, Speaking, And Critical Thinking / Christien Lee". Amerika Serikat: Sherrise Roehr, 2017. Text.