Gaya APA

Ratnah, . (2013). Feedback expressions used by an English teacher of tour and travel department . Bandung: UPT Balai Bahasa, Universitas Pendidikan Indonesia.

Gaya MLA

Ratnah, . "Feedback expressions used by an English teacher of tour and travel department". Bandung: UPT Balai Bahasa, Universitas Pendidikan Indonesia, 2013. Text.