Gaya APA

Schoenberg, I, E. (2002). Focus on grammar : an introductory course for reference and practice / Irene E. Schoenberg, Jay Maurer . New York: Longman.

Gaya MLA

Schoenberg, Irene, E.. "Focus on grammar : an introductory course for reference and practice / Irene E. Schoenberg, Jay Maurer". New York: Longman, 2002. Buku.