APA (7th ed.) Citation

Le Roy, B. (1968). Northwest forts and trading posts. Washington State Historical Society.

Chicago Style (17th ed.) Citation

Le Roy, Bruce. Northwest Forts and Trading Posts. Tacoma: Washington State Historical Society, 1968.

MLA (8th ed.) Citation

Le Roy, Bruce. Northwest Forts and Trading Posts. Washington State Historical Society, 1968.

Warning: These citations may not always be 100% accurate.