Boyd, J. R., & Boyd, M. A. (1991). Before book one: Listening activities for prebeginning students of English, Teacher's edition (2nd ed.). Prentice Hall Regents.
Chicago Style (17th ed.) CitationBoyd, John R., and Mary Ann Boyd. Before Book One: Listening Activities for Prebeginning Students of English, Teacher's Edition. 2nd ed. Englewood Cliffs, NJ: Prentice Hall Regents, 1991.
MLA (9th ed.) CitationBoyd, John R., and Mary Ann Boyd. Before Book One: Listening Activities for Prebeginning Students of English, Teacher's Edition. 2nd ed. Prentice Hall Regents, 1991.
Warning: These citations may not always be 100% accurate.