Chamot, A. U., & O'Malley, J. M. (1994). The CALLA handbook: Implementing the cognitive academic language learning approach. Addison-Wesley Pub. Co..

Chamot, Anna Uhl, and J. Michael O'Malley. The CALLA Handbook: Implementing the Cognitive Academic Language Learning Approach. Reading, Mass.: Addison-Wesley Pub. Co., 1994.

Chamot, Anna Uhl, and J. Michael O'Malley. The CALLA Handbook: Implementing the Cognitive Academic Language Learning Approach. Addison-Wesley Pub. Co., 1994.