Gaya APA

Pusparini, U., Muhtarom, . (2015). Positive Politeness Strategies Used by Sohpie and Alberto Knox in Sophie's World Film . Surabaya: Fakultas Adab dan Humaniora UINSA.

Gaya MLA

Pusparini, Ukik., Muhtarom, . "Positive Politeness Strategies Used by Sohpie and Alberto Knox in Sophie's World Film". Surabaya: Fakultas Adab dan Humaniora UINSA, 2015. Skripsi.