APA (7th ed.) Citation

ScienceDirect (Online service), Postman, L. J., & Keppel, G. (1970). Norms of word association. Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Leo Joseph Postman, and Geoffrey Keppel. Norms of Word Association. New York: Academic Press, 1970.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Norms of Word Association. Academic Press, 1970.