APA (7th ed.) Citation

Peterson, H., & Wikland, I. (1969). Erik and the Christmas horse. Burke.

Chicago Style (17th ed.) Citation

Peterson, Hans, and Ilon Wikland. Erik and the Christmas Horse. London: Burke, 1969.

MLA (9th ed.) Citation

Peterson, Hans, and Ilon Wikland. Erik and the Christmas Horse. Burke, 1969.