Gaya APA

Lubis, . (2009). Improving Students' Speaking Skill Through Substitution Drills at the Eleventh year Students' of MAN Palopo . Palopo: Prodi Bahasa Inggris Jurusan TARBIYAH STAIN Palopo.

Gaya MLA

Lubis, . "Improving Students' Speaking Skill Through Substitution Drills at the Eleventh year Students' of MAN Palopo". Palopo: Prodi Bahasa Inggris Jurusan TARBIYAH STAIN Palopo, 2009. Text.