APA (7th ed.) Citation

Hill, B., & Hill, R. (1975). Indian petroglyphs of the Pacific Northwest. University of Washington Press.

Chicago Style (17th ed.) Citation

Hill, Beth, and Ray Hill. Indian Petroglyphs of the Pacific Northwest. Seattle: University of Washington Press, 1975.

MLA (9th ed.) Citation

Hill, Beth, and Ray Hill. Indian Petroglyphs of the Pacific Northwest. University of Washington Press, 1975.