Gaya APA

muthok, M, K. (2013). Implementing problem based learning to improve speaking skill of the eleventh grade students of network computer technique (TKJ) of SMK Baitul Atieq Cepoko Berbek Nganjuk in the academic year of 2011/2012 / M. Khoirul Muthok (Cet. 1). Jakarta: Pustaka Pelajar.

Gaya MLA

muthok, M., Khoirul. "Implementing problem based learning to improve speaking skill of the eleventh grade students of network computer technique (TKJ) of SMK Baitul Atieq Cepoko Berbek Nganjuk in the academic year of 2011/2012 / M. Khoirul Muthok". Cet. 1 Jakarta: Pustaka Pelajar, 2013. Text.