APA (7th ed.) Citation

Spring, B., Spring, I., & Manning, H. (1976). National parks of the Northwest. Superior Pub. Co..

Chicago Style (17th ed.) Citation

Spring, Bob, Ira Spring, and Harvey Manning. National Parks of the Northwest. Seattle, Wash.: Superior Pub. Co., 1976.

MLA (8th ed.) Citation

Spring, Bob, et al. National Parks of the Northwest. Superior Pub. Co., 1976.

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