Gaya APA

Fitria, . et al (2012). Using portofolio as method of assessing students' writing skill : Fitria; pembimbing: Muhammad Salik, Auliya Ridwan . Surabaya: Fakultas Tarbiyah.

Gaya MLA

Fitria, . et al. "Using portofolio as method of assessing students' writing skill : Fitria; pembimbing: Muhammad Salik, Auliya Ridwan". Surabaya: Fakultas Tarbiyah, 2012. Skripsi.