Gaya APA

SARI, N, I, K. (2009). Using pictures to improve students writing skill (A collaborative action research at the seventh . : Universitas Sebelas Maret.

Gaya MLA

SARI, Nurul, Isnaini, Kusuma. "Using pictures to improve students writing skill (A collaborative action research at the seventh". : Universitas Sebelas Maret, 2009. Skripsi.