Gaya APA

P, R, A., Hestuti, E. (2008). LET'S UNDERSTAND ENGLISH . SURAKARTA: PT. ERA PUSTAKA UTAMA.

Gaya MLA

P, Reni, Agustin., Hestuti, Eni. "LET'S UNDERSTAND ENGLISH". SURAKARTA: PT. ERA PUSTAKA UTAMA, 2008. Text.