APA (7th ed.) Citation

Maxwell, A. E., & Ruud, I. (1976). The year-long day: One man's Arctic. Lippincott.

Chicago Style (17th ed.) Citation

Maxwell, A. E., and Ivar Ruud. The Year-long Day: One Man's Arctic. Philadelphia: Lippincott, 1976.

MLA (9th ed.) Citation

Maxwell, A. E., and Ivar Ruud. The Year-long Day: One Man's Arctic. Lippincott, 1976.