Cita APA (7a ed.)

Sandved, K. B., & Brewer, J. (1976). Butterflies. H. N. Abrams.

Cita Chicago Style (17a ed.)

Sandved, Kjell Bloch, y Jo Brewer. Butterflies. New York: H. N. Abrams, 1976.

Cita MLA (9a ed.)

Sandved, Kjell Bloch, y Jo Brewer. Butterflies. H. N. Abrams, 1976.