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.