Gaya APA

Agustiana, R., Hestuti, E. (2010). Let's Understand English (Cet. II). Surakarta: Era Pustaka Utama.

Gaya MLA

Agustiana, Rike., Hestuti, Eni. "Let's Understand English". Cet. II Surakarta: Era Pustaka Utama, 2010. Text.