Modul
Alexander, L.G. 2003. Longman English Grammar. New York: Longman Publishing
Azar, B. Schrampfer. 1989. Understanding and Using English Grammar, Prentice Hall.
Celce, Marianne. Murcia Diane Larsen. 1999. The Grammar Book, Heinle & Heinle Publishers.
Foley, Mark. Dianne Hall. 2005. Advanced Learners’ Grammar, Longman.
Frank. Marcella, 1972. Modern English, New York University
Martin, Hewings. 2002. Advanced Grammar in Use. Cambridge University.
Murphy, Raymond.
1994. English Grammar in Use,
Cambridge University