Arbuthnot, J. Environmental knowledge and recycling behavior as a fuction of attitudes and personality characteristics. Vol. 1. 1974. 119-121.

Katzev, R. D. & Pardini, A. U. The comparative effectiveness of reward and commitment approaches in motivating community recycling. Vol. 17. 1987-1988. 93-113.

Katzev, R. & Wang, T. Can commitment change behavior? A case study of environmental actions. Vol. 9. 1994. 13-26.

Krauss, R. M. & Freedman, J. L. & Whitcup, M. (1978). Field and laboratory studies of littering. Journal of Experimental Social Psychology, 14, 1, 109-122.

Werner, C. M., Turner, J., Shipman, K., Twitchell, F. S., et al. (1995). Commitment, behavior, and attitude change: An analysis of voluntary recycling. Special Issue: Green psychology. Journal of Environmental Psychology, 15, 3, 197-208.

Whitfield, D. H. (June 12, 1989). Lessons from Ryley: Community involvement in hazardous waste. Notes on a presentation to Canadian Federation of Municipalities. (pp. 1-11). Vancouver, British Columbia:

Werner, C. M., Turner, J., Shipman, K., Twitchell, F. S., et al. (1995). Commitment, behavior, and attitude change: An analysis of voluntary recycling. Special Issue: Green psychology. Journal of Environmental Psychology, 15, 3, 197-208.

Schultz, P. W., Oskamp, S., & Mainieri, T. (1995). Who recycles and when? A review of personal and situational factors. Journal of Enviornmental Psychology, 15, 2, 105-121.

Lee, Y. J., De Young, R., & Marans, R. W. (1995). Factors influencing individual recycling behavior in office settings: A study of office workers in Taiwan. Environment and Behavior, 27, 3, 380-403.

DeLeon, I. G., & Fuqua, R. W. (1995). The effects of public commitment and group feedback on curbside recycling. Special Issue: Litter control and recycling. Environment and Behavior, 27, 2, 233-250.