Cita APA (7a ed.)
Kooyman, G. L., & Lynch, W. (2013). Penguins: The animal answer guide. The Johns Hopkins University Press.
Cita Chicago Style (17a ed.)
Kooyman, Gerald L., y Wayne Lynch. Penguins: The Animal Answer Guide. Baltimore: The Johns Hopkins University Press, 2013.
Cita MLA (9a ed.)
Kooyman, Gerald L., y Wayne Lynch. Penguins: The Animal Answer Guide. The Johns Hopkins University Press, 2013.
Precaución: Estas citas no son 100% exactas.