Gaya APA

0210633, S, A, /. (2007). A Study On The Ability Of The Third Semester Students Of ENglish Study Program FKIP UNRI Pekanbaru In Identifying Modal Auxiliaries Followed By Perfect Tense . Pekanbaru: Universitas Riau - FKIP – Pendidikan Bahasa Inggris.

Gaya MLA

0210633, SITI, AISYAH, /. "A Study On The Ability Of The Third Semester Students Of ENglish Study Program FKIP UNRI Pekanbaru In Identifying Modal Auxiliaries Followed By Perfect Tense". Pekanbaru: Universitas Riau - FKIP – Pendidikan Bahasa Inggris, 2007. CD Skripsi.