Jones, L., & Von Baeyer, C. (1983). Functions of American English: Communication activities for the classroom : student's book. Cambridge University Press.

Jones, Leo, and C. Von Baeyer. Functions of American English: Communication Activities for the Classroom : Student's Book. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1983.

Jones, Leo, and C. Von Baeyer. Functions of American English: Communication Activities for the Classroom : Student's Book. Cambridge University Press, 1983.