Gaya APA

S.Pd., R, A, P., S.S, E, H. (2008). Let's Understand English . surakarta: Era pustaka utama.

Gaya MLA

S.Pd., Reni, Agustin, P,., S.S, Eni, Hestuti,. "Let's Understand English". surakarta: Era pustaka utama, 2008. Text.