APA (7th ed.) Citation

Lagerlöf, S., & Howard, V. S. (1920). Further adventures of Nils. Doubleday, Page & Company.

Chicago Style (17th ed.) Citation

Lagerlöf, Selma, and Velma Swanston Howard. Further Adventures of Nils. Garden City, N.Y.: Doubleday, Page & Company, 1920.

MLA (9th ed.) Citation

Lagerlöf, Selma, and Velma Swanston Howard. Further Adventures of Nils. Doubleday, Page & Company, 1920.