Gaya APA

Fitria, ., Salik, M, A. (2012). Using portofolio as method of assessing students' writing skill / Fitria; pembimbing: Muhammad Salik, Auliya Ridwan . IAIN Sunan Ampel Surabaya: Fakultas Tarbiyah.

Gaya MLA

Fitria, ., Salik, MuhammadRidwan,, Auliya. "Using portofolio as method of assessing students' writing skill / Fitria; pembimbing: Muhammad Salik, Auliya Ridwan". IAIN Sunan Ampel Surabaya: Fakultas Tarbiyah, 2012. Skripsi.