Cita APA (7a ed.)
Stokking, K., & Stokking, K. M. (1999). Evaluating environmental education. Commission on Education and Communication, IUCN.
Cita Chicago Style (17a ed.)
Stokking, K., y K. M. Stokking. Evaluating Environmental Education. Gland ; Cambridge: Commission on Education and Communication, IUCN, 1999.
Cita MLA (9a ed.)
Stokking, K., y K. M. Stokking. Evaluating Environmental Education. Commission on Education and Communication, IUCN, 1999.
Precaución: Estas citas no son 100% exactas.