Cita APA

Hungerford, H. R., & Peyton, B. (1980). Strategies for developing and environmental education curriculum: A discussion guide for UNESCO training workshop on environmental education. Unesco.

Citación estilo Chicago

Hungerford, Harold R., and Ben Peyton. Strategies for Developing and Environmental Education Curriculum: A Discussion Guide for UNESCO Training Workshop on Environmental Education. [Paris]: Unesco, 1980.

Cita MLA

Hungerford, Harold R., and Ben Peyton. Strategies for Developing and Environmental Education Curriculum: A Discussion Guide for UNESCO Training Workshop on Environmental Education. Unesco, 1980.