Gaya APA

S.Pd., S, W., S.Pd, Y, Y. (2008). Happy with English . Surakarta: PT Era Pustaka Utama.

Gaya MLA

S.Pd., Susilo, Wardani,., S.Pd, Yuyun, Yuningsih,. "Happy with English". Surakarta: PT Era Pustaka Utama, 2008. Text.