Delay of Reinforcement Development.

MLA

Walls, Richard T. “Delay of Reinforcement Development.” Child Development, vol. 44, no. 3, Sept. 1973, pp. 689–92. EBSCOhost, https://doi.org/10.2307/1128034.

APA

Walls, R. T. (1973). Delay of Reinforcement Development. Child Development, 44(3), 689–692. https://doi.org/10.2307/1128034

Chicago

Walls, Richard T. 1973. “Delay of Reinforcement Development.” Child Development 44 (3): 689–92. doi:10.2307/1128034.