Gaya APA

PUTRI, R, E, E. (2010). Teaching seventh grade students of SMP N 20 Surakarta to write descriptions: . : Universitas Sebelas Maret.

Gaya MLA

PUTRI, Resa, Estiani, Edi. "Teaching seventh grade students of SMP N 20 Surakarta to write descriptions: ". : Universitas Sebelas Maret, 2010. TA.