Gaya APA

Lestari, S., M.Pd, D, W, R. (2008). A Descriptive Study of Teachers Comperency to English Achievement of the Second Year Students of SMP NU 1 Wonosegoro Boyolali in the Academic Year of 2007/2008 . Salatiga: STAIN Salatiga.

Gaya MLA

Lestari, Sri., M.Pd, Dra., Woro, Retnaningsih,. "A Descriptive Study of Teachers Comperency to English Achievement of the Second Year Students of SMP NU 1 Wonosegoro Boyolali in the Academic Year of 2007/2008". Salatiga: STAIN Salatiga, 2008. Text.