Gaya APA

Gunawan, M, I. (2017). Types and Markers Of Politeness Depicted In Public Service Advertisements in Pekanbaru . Padang: Universitas Andalas.

Gaya MLA

Gunawan, Muhammad, Indra. "Types and Markers Of Politeness Depicted In Public Service Advertisements in Pekanbaru". Padang: Universitas Andalas, 2017. Skripsi.