Ward, D. J., & Lowery, M. (2015). Simple machines (First edition.). Harper, an imprint of HarperCollins Publishers.
Cita Chicago Style (17a ed.)Ward, D. J., y Mike Lowery. Simple Machines. First edition. New York, NY: Harper, an imprint of HarperCollins Publishers, 2015.
Cita MLA (8a ed.)Ward, D. J., y Mike Lowery. Simple Machines. First edition. Harper, an imprint of HarperCollins Publishers, 2015.
Precaución: Estas citas no son 100% exactas.