Gaya APA

S.PD., Y, Y., S.PD, S, W. (2008). HAPPY WITH ENGLISH . SURAKARTA: ERA PUSTAKA UTAMA.

Gaya MLA

S.PD., YUYUN, YUNINGSIH,., S.PD, SUSILO, WARDANI,. "HAPPY WITH ENGLISH". SURAKARTA: ERA PUSTAKA UTAMA, 2008. Text.