APA (7th ed.) Citation

Blum, M. L., & Foos, P. W. (1986). Data gathering experimental methods plus. Harper & Row.

Chicago Style (17th ed.) Citation

Blum, M L., and Paul W. Foos. Data Gathering Experimental Methods Plus. New York: Harper & Row, 1986.

MLA (9th ed.) Citation

Blum, M L., and Paul W. Foos. Data Gathering Experimental Methods Plus. Harper & Row, 1986.