Cita APA (7a ed.)

Layberry, R. A., Hall, P. W., & Lafontaine, J. D. (1998). The butterflies of Canada. University of Toronto Press.

Cita Chicago Style (17a ed.)

Layberry, Ross A., Peter W. Hall, y J. Donald Lafontaine. The Butterflies of Canada. Toronto [Ontario] ; Buffalo [New York]: University of Toronto Press, 1998.

Cita MLA (8a ed.)

Layberry, Ross A., et al. The Butterflies of Canada. University of Toronto Press, 1998.