APA aipamena

Walker, E., & Elsworth, S. (1994). Grammar Practice for Intermediate Srudents. London: Longman.

Chicago Style aipamena

Walker, Elaine, và Steve Elsworth. Grammar Practice for Intermediate Srudents. London: Longman, 1994.

MLA aipamena

Walker, Elaine, và Steve Elsworth. Grammar Practice for Intermediate Srudents. London: Longman, 1994.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.