Cita APA (7th ed.)

Caldwell, L. K., Hayes, L. R., & MacWhirter, I. M. (1976). Citizens and the environment: Case studies in popular action. Indiana University Press.

Cita Chicago (17th ed.)

Caldwell, Lynton Keith, Lynton R. Hayes, i Isabel M. MacWhirter. Citizens and the Environment: Case Studies in Popular Action. Bloomington: Indiana University Press, 1976.

Cita MLA (9th ed.)

Caldwell, Lynton Keith, et al. Citizens and the Environment: Case Studies in Popular Action. Indiana University Press, 1976.