United Nations. Environment Programme. (1980). Choosing the options: Alternative lifestyles and development patterns. United Nations Environment Programme.
Citazione stile Chigago Style (17a edizione)United Nations. Environment Programme. Choosing the Options: Alternative Lifestyles and Development Patterns. Nairobi: United Nations Environment Programme, 1980.
Citatione MLA (9a ed.)United Nations. Environment Programme. Choosing the Options: Alternative Lifestyles and Development Patterns. United Nations Environment Programme, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.