APA (7th ed.) Citation

Holl, A., Schmitt-Menzel, I., & Newth, M. (1975). The little Viking. Golden Press.

Chicago Style (17th ed.) Citation

Holl, Adelaide, Isolde Schmitt-Menzel, and Mette Newth. The Little Viking. New York: Golden Press, 1975.

MLA (9th ed.) Citation

Holl, Adelaide, et al. The Little Viking. Golden Press, 1975.