9Bialyatock, E. 1983. Some factors in the selection and implementation of communication strategies, In C. Faerch & G. Kasper (eds.).Strategied in language communication. London: Longman.
10Cohen, A.D.& Aphek. 1980. Retention of second language vocabulary over time: Investigating the role of mnemonic associationa. Syatem 8:221 - 235.