O'Malley, J. M., & Chamot, A. U. (1990). Learning strategies in second language acquisition. Cambridge University Press.

O'Malley, J. Michael, and Anna Uhl Chamot. Learning Strategies in Second Language Acquisition. Cambridge [England] ; New York: Cambridge University Press, 1990.

O'Malley, J. Michael, and Anna Uhl Chamot. Learning Strategies in Second Language Acquisition. Cambridge University Press, 1990.