Cita APA

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

Chicago Style Citation

Walker, Elaine, i Steve Elsworth. Grammar Practice for Elementary Srudents. London: Longman, 1994.

Cita MLA

Walker, Elaine, i Steve Elsworth. Grammar Practice for Elementary Srudents. London: Longman, 1994.

Atenció: Aquestes cites poden no estar 100% correctes.