APA (7th ed.) Citation

Asbjørnsen, P. C., & Galdone, P. (1973). The three billy goats Gruff. Seabury Press.

Chicago Style (17th ed.) Citation

Asbjørnsen, Peter Christen, and Paul Galdone. The Three Billy Goats Gruff. New York: Seabury Press, 1973.

MLA (9th ed.) Citation

Asbjørnsen, Peter Christen, and Paul Galdone. The Three Billy Goats Gruff. Seabury Press, 1973.