The Effects of an Ambiguous, Negative Sign Prompts and a Clearly-Stated Positive Sign Prompt on Intentions to Litter
Horsley, A. D. (1988). The unintended effects of a posted sign on littering attitudes and stated intentions. Journal of Environmental Education, 19, 3, 10-14.
Using Proximity of Trash Cans and Ash Trays to Increase Convenience of Separating Litter in a Blacksburg, Virginia Shopping Mall
Geller, E. S., Brasted, W. S. & Mann, M. F. (1979). Waste receptacle designs as interventions for litter control. Journal of Environmental Systems, 9, 2, 145-160.
Clean Builder Program
Using Verbal and Visual Prompts to Reduce Litter in High Schools in Perth, Australia
Houghton, S. (1993). Using verbal and visual prompts to control littering in high schools. Educational Studies, 19, 3, 247-254.
Using a Normative Appeal to Control Litter at a Public Swimming Pool
Reich, J. W., & Robertson, J. L. (1979). Reactance and norm appeal in anti-littering messages. Journal of Applied Social Psychology, 9, 1, 91-101.
