Gaya APA

AGUSTIN, R., HESTUTI, E. (2009). LET'S UNDERSTAND ENGLISH . SURAKARTA: PT. ERA PUSTAKA UTAMA.

Gaya MLA

AGUSTIN, RENI., HESTUTI, ENI. "LET'S UNDERSTAND ENGLISH". SURAKARTA: PT. ERA PUSTAKA UTAMA, 2009. Text.