Cowie, A. (1989). Oxford advanced learner's dictionary of current english (4th ed.). Oxfor University Press.

Cowie, A.P. Oxford Advanced Learner's Dictionary of Current English. 4th ed. New York: Oxfor University Press, 1989.

Cowie, A.P. Oxford Advanced Learner's Dictionary of Current English. 4th ed. Oxfor University Press, 1989.