Gaya APA

Muchtar, M. (2005). Some common problems of learning English Vocabulary to Indonesian learners (Vol. 5, No. 1/ April 2005). Medan: Fakultas Sastra Universitas Islam Sumatera Utara.

Gaya MLA

Muchtar, Muhizar. "Some common problems of learning English Vocabulary to Indonesian learners". Vol. 5, No. 1/ April 2005 Medan: Fakultas Sastra Universitas Islam Sumatera Utara, 2005. Art Original.