APA (7e ed.) Bronvermelding

Sovak, J., & Reid, M. (1992). Butterflies: Coloring Book. Dover Publications, INC.

Chicago (17e ed.) Bronvermelding

Sovak, Jan, en Monty Reid. Butterflies: Coloring Book. New York: Dover Publications, INC, 1992.

MLA (9e ed.) Bronvermelding

Sovak, Jan, en Monty Reid. Butterflies: Coloring Book. Dover Publications, INC, 1992.