Gaya APA

P.S.Pd, R, A, ., Hestuti,S.S, E. (2009). Lets Understand English (2). Surakarta: Era Pustaka Utama.

Gaya MLA

P.S.Pd, Reni, Agustin, ., Hestuti,S.S, Eni. "Lets Understand English". 2 Surakarta: Era Pustaka Utama, 2009. Text.