APA Style

Manalu, R, R. (2005). The Influence of Portfolio Assessment on the Students' Writing Skill in STBA LIA Pengadegan Jakarta . Jakarta: STBA LIA.

MLA Style

Manalu, Ritha, Rohayati. "The Influence of Portfolio Assessment on the Students' Writing Skill in STBA LIA Pengadegan Jakarta". Jakarta: STBA LIA, 2005. Skripsi.