Schullery, P. (2001). America's national parks: The spectacular forces that shaped our treasured lands (1a. ed.). Discovery Channel.
Цитирование в стиле Чикаго (17-е изд.)Schullery, Paul. America's National Parks: The Spectacular Forces That Shaped Our Treasured Lands. 1a. ed. Nueva York: Discovery Channel, 2001.
Цитирование MLA (9-е изд.)Schullery, Paul. America's National Parks: The Spectacular Forces That Shaped Our Treasured Lands. 1a. ed. Discovery Channel, 2001.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.