Gaya APA

S.Pd, R, A, P. (2008). Let's Understand English (2008). Surakarta: PT. Era Pustaka Utama.

Gaya MLA

S.Pd, Reni, Agustin, P,. "Let's Understand English". 2008 Surakarta: PT. Era Pustaka Utama, 2008. Abdul Gaffar.