Sheldon, D. (2009). Into the deep: The life of naturalist and explorer William Beebe. Charlesbridge.
Cita Chicago Style (17a ed.)Sheldon, David. Into the Deep: The Life of Naturalist and Explorer William Beebe. Watertown, Mass,: Charlesbridge, 2009.
Cita MLA (8a ed.)Sheldon, David. Into the Deep: The Life of Naturalist and Explorer William Beebe. Charlesbridge, 2009.
Precaución: Estas citas no son 100% exactas.