Bem, S.L. (1974). The measurement of psychological androgyny. Journal of Consulting and Clinical Psychology. 42, 155–62.
McClelland, D. C., Atkinson, J. W., Clark, R. A., & Lowell, E. L. (1958). A scoring manual for the achievement motive; R. W. Heyns, J. Veroff, & J. W. Atkinson, A scoring manual for the affiliation motive; J. Veroff, A scoring manual for the power motive. Respectively, Chapters 12, 13 and 14 in J. W. Atkinson (Ed.), Motives in Fantasy, Action and Society. New York: Van Nostrand.