International Friends of Nature. (1991). Everybody's talking about soft tourism: We're doing something about it! : ten practical examples of what the Friends of Nature have done. International Friends of Nature.
Цитирование в стиле Чикаго (17-е изд.)International Friends of Nature. Everybody's Talking About Soft Tourism: We're Doing Something About It! : Ten Practical Examples of What the Friends of Nature Have Done. Vienna: International Friends of Nature, 1991.
Цитирование MLA (8-е изд.)International Friends of Nature. Everybody's Talking About Soft Tourism: We're Doing Something About It! : Ten Practical Examples of What the Friends of Nature Have Done. International Friends of Nature, 1991.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.