Gaya APA

S.Pd, R, A, P. (2008). LET'S UNDERSTAND ENGLISH (2015). SURAKARTA: ERA PUSTAKA UTAMA.

Gaya MLA

S.Pd, RENI, AGUSTIN, P.. "LET'S UNDERSTAND ENGLISH". 2015 SURAKARTA: ERA PUSTAKA UTAMA, 2008. Referensi.