Gladstone, J., & Diemert, K. (2017). When planet Earth was new. Owlkids Books Inc.
Cita Chicago Style (17a ed.)Gladstone, James, y Katherine Diemert. When Planet Earth Was New. Toronto, ON ; Berkeley, CA: Owlkids Books Inc, 2017.
Cita MLA (8a ed.)Gladstone, James, y Katherine Diemert. When Planet Earth Was New. Owlkids Books Inc, 2017.
Precaución: Estas citas no son 100% exactas.