ScienceDirect (Online service), Ellis, N. R., & Bray, N. W. (1984). International review of research in mental retardation. Academic Press.
Chicago Style (17th ed.) CitationScienceDirect (Online service), Norman R. Ellis, and Norman W. Bray. International Review of Research in Mental Retardation. New York: Academic Press, 1984.
MLA (9th ed.) CitationScienceDirect (Online service), et al. International Review of Research in Mental Retardation. Academic Press, 1984.
Warning: These citations may not always be 100% accurate.