Blum, M. L., & Naylor, J. C. (1968). Industrial Psychology: Its theoretical and social foundations (rev ed.). Harper and Row.

Blum, Milton L., and James C. Naylor. Industrial Psychology: Its Theoretical and Social Foundations. rev ed. New York: Harper and Row, 1968.

Blum, Milton L., and James C. Naylor. Industrial Psychology: Its Theoretical and Social Foundations. rev ed. Harper and Row, 1968.