APA (7th ed.) Citation

Christensen, I., Nied, S., & Foss, J. (2011). Light, grass, and letter in April. New Directions.

Chicago Style (17th ed.) Citation

Christensen, Inger, Susanna Nied, and Johanne Foss. Light, Grass, and Letter in April. New York: New Directions, 2011.

MLA (9th ed.) Citation

Christensen, Inger, et al. Light, Grass, and Letter in April. New Directions, 2011.