APA (7th ed.) Citation

Curtis, J., Curtis, W., & Lieberman, F. (1995). Monhegan, the artists' island. Down East Books.

Chicago Style (17th ed.) Citation

Curtis, Jane, Will Curtis, and Frank Lieberman. Monhegan, the Artists' Island. Camden, Me.: Down East Books, 1995.

MLA (8th ed.) Citation

Curtis, Jane, et al. Monhegan, the Artists' Island. Down East Books, 1995.