Krull, K., & Hall, M. (2014). What's new? The zoo!: A zippy history of zoos (First edition.). Arthur A. Levine Books.
Cita Chicago Style (17a ed.)Krull, Kathleen, y Marcellus Hall. What's New? The Zoo!: A Zippy History of Zoos. First edition. New York: Arthur A. Levine Books, 2014.
Cita MLA (8a ed.)Krull, Kathleen, y Marcellus Hall. What's New? The Zoo!: A Zippy History of Zoos. First edition. Arthur A. Levine Books, 2014.
Precaución: Estas citas no son 100% exactas.