Robinson, S. N. (1976). Littering behavior in public places. Environment and Behavior, 8, 3, 363-384.

Reno, R. R., Cialdini, R. B. & Kallgren, C. A. (1993). The transsituational influence of social norms. Journal of Personality and Social Psychology, 64, 1, 104-112.

Geller, E. S. (1973). Prompting anti-litter behaviors. Proceedings of the Annual Convention of the American Psychological Association, 907-908.

Geller, E. S. (1975). Increasing desired waste disposals with instructions. Man Environment Systems, 5, 2, 125-128.

Cialdini, R. B. & Baumann, D. J. (1981). Littering: A new unobtrusive measure of attitude. Social Psychology Quarterly, 44, 3, 254-259.

Keenan, M. (1996). The A, B, C of litter control. Irish Journal of Psychology, 17, 4, 327-339.

Harper, K. M. (1999). Middle-income African-Americans and household hazardous waste management: Designing messages for adult environmental education. Dissertation Abstracts International: Section B: The Sciences and Engineering., 59, 7-B,

Reiter, S. M. & Samuel, W. (1980). Littering as a function of prior litter and the presence or absence of prohibitive signs . Journal of Applied Social Psychology, 10, 1, 45-55.

Mcnutt, T. S. (1995). Marketing social responsibility: An empirical investigation of the relationship between domain familiarity and consumers' perceived self knowledge of recycling information. Dissertation Abstracts International Section A: Humanities and Social Sciences, 56, 6-A,

Wright, R. E. (1992). An investigation of the relative importance of factors influencing recycling behavior. Dissertation Abstracts International, 52, 11-A,