Ingersoll, G. E. (1933). Small scale methods of placer mining and placer mining districts of Washington and Oregon. State college of Washington.
Цитирование в стиле Чикаго (17-е изд.)Ingersoll, Guy Ernest. Small Scale Methods of Placer Mining and Placer Mining Districts of Washington and Oregon. [Pullman: State college of Washington, 1933.
Цитирование MLA (8-е изд.)Ingersoll, Guy Ernest. Small Scale Methods of Placer Mining and Placer Mining Districts of Washington and Oregon. State college of Washington, 1933.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.