Gaya APA

P.S.Pd, R, A., S.S., E, H. (2009). LET'S UNDERSTAND ENGLISH . Surakarta: PT. ERA PUSTAKA UTAMA.

Gaya MLA

P.S.Pd, RENI, AGUSTIN., S.S., ENI, HESTUTI,. "LET'S UNDERSTAND ENGLISH". Surakarta: PT. ERA PUSTAKA UTAMA, 2009. Art Original.