APA (7th ed.) Citation

Mittler, P. J., & De Jong, J. M. (1981). Frontiers of knowledge in mental retardation: Fifth Congress of the International Association for the Scientific Study of Mental Deficiency (IASSMD). University Park Press.

Chicago Style (17th ed.) Citation

Mittler, Peter J., and Jean M. De Jong. Frontiers of Knowledge in Mental Retardation: Fifth Congress of the International Association for the Scientific Study of Mental Deficiency (IASSMD). Baltimore: University Park Press, 1981.

MLA (9th ed.) Citation

Mittler, Peter J., and Jean M. De Jong. Frontiers of Knowledge in Mental Retardation: Fifth Congress of the International Association for the Scientific Study of Mental Deficiency (IASSMD). University Park Press, 1981.