Harley, B., Allen, P., & Swain, M. K. (1990). The development of second language proficiency. Cambridge: Cambridge University Press.
Chicago Style CitationHarley, Birgit, Patrick Allen, and Merrill Kathleen Swain. The Development of Second Language Proficiency. Cambridge: Cambridge University Press, 1990.
MLA CitationHarley, Birgit, Patrick Allen, and Merrill Kathleen Swain. The Development of Second Language Proficiency. Cambridge: Cambridge University Press, 1990.
Warning: These citations may not always be 100% accurate.