Durdan, C. A., Reeder, G. D. & Hecht, P. R. (1985). Litter in a university cafeteria: Demographic data and the use of prompts as an intervention strategy. Environment and Behavior, 17, 3, 387-404.

Cope, J. G., Huffman, K. T., Allred, L. J. & Grossnickle, W. F. (1993). Behavioral strategies to reduce cigarette litter. Journal of Social Behavior and Personality, 8, 4, 607-619.

Geller, E. S., Farris, J. C. & Post, D. S. (1973). Prompting a consumer behavior for pollution control. Journal of Applied Behavior Analysis, 6, 3, 367-376.

Baltes, M. M. & Hayward, S. C. (1976). Application and evaluation of strategies to reduce pollution: Behavioral control of littering in a football stadium. Journal of Applied Psychology, 61, 4, 501-506.

Wagstaff, M. C. & Wilson, B. E. (1988). The evaluation of litter behavior modification in a river environment. Journal of Environmental Education, 20, 1, 39-44.

Dixon, R. S., Knott, T., Rowsell, H. & Sheldon, L. (1992). Prompts and posted feedback: In search of an effective method of litter control. Behaviour Change, 9, 1, 2-7.

Kohlenberg, R. & Phillips, T. (1973). Reinforcement and rate of litter depositing. Journal of Applied Behavior Analysis, 6, 3, 391-396.

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

Geller, E. S., Witmer, J. F. & Tuso, M. A. (1977). Environmental interventions for litter control.. Journal of Applied Psychology, 62, 3, 344-351.

Werner, C. M., Rhodes, M.U. & Partain, K. K. (1998). Designing effective instructional signs with schema theory: Case studies of polystyrene recycling. Environment and Behavior, 30, 5, 709-735.