Gaya APA

SIANTURI, S. (2016). Realization of politeness strategies in sending short messages service (SMS) by the fifth semester students of english department of HKBP Nommensen University . Medan: Universitas HKBP Nommensen.

Gaya MLA

SIANTURI, Srisofian. "Realization of politeness strategies in sending short messages service (SMS) by the fifth semester students of english department of HKBP Nommensen University". Medan: Universitas HKBP Nommensen, 2016. Artikel.