Gaya APA

Sutrisni, . (2007). The Effecet of Using Contextual Teaching Learning on the Students' Achievement in Writing . : Universitas Muhammadiyah Sumatera Utara.

Gaya MLA

Sutrisni, . "The Effecet of Using Contextual Teaching Learning on the Students' Achievement in Writing". : Universitas Muhammadiyah Sumatera Utara, 2007. .