APA (7th ed.) Citation

Stokking, K., & Stokking, K. M. (1999). Evaluating environmental education. Commission on Education and Communication, IUCN.

Chicago Style (17th ed.) Citation

Stokking, K., and K. M. Stokking. Evaluating Environmental Education. Gland ; Cambridge: Commission on Education and Communication, IUCN, 1999.

MLA (9th ed.) Citation

Stokking, K., and K. M. Stokking. Evaluating Environmental Education. Commission on Education and Communication, IUCN, 1999.