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.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.