APA (7th ed.) Citation

Porter, E., & Brower, D. (1966). Summer Island: Penobscot country. Sierra Club.

Chicago Style (17th ed.) Citation

Porter, Eliot, and David Brower. Summer Island: Penobscot Country. San Francisco: Sierra Club, 1966.

MLA (9th ed.) Citation

Porter, Eliot, and David Brower. Summer Island: Penobscot Country. Sierra Club, 1966.