Gaya APA

S.Pd., R, A, P., Hestuti,S.S., E. (2008). Let`s Understand English . Surakarta: era pustaka utama.

Gaya MLA

S.Pd., Reni, Agustin, P,., Hestuti,S.S., Eni. "Let`s Understand English". Surakarta: era pustaka utama, 2008. Text.