Gaya APA

PUTRO, B, P. (2007). Improving english achievement of the fourth grade students of SDN Ponowaren I Sukoharjo by using.... . : Univeritas Sebelas Maret.

Gaya MLA

PUTRO, Bayu, Pramono. "Improving english achievement of the fourth grade students of SDN Ponowaren I Sukoharjo by using....". : Univeritas Sebelas Maret, 2007. Skripsi.