Boothroyd, J., & Intuitive. (2017). What holds us to earth?: A look at gravity.
Cita Chicago Style (17a ed.)Boothroyd, Jennifer, y Intuitive. What Holds Us to Earth?: A Look at Gravity. 2017.
Cita MLA (8a ed.)Boothroyd, Jennifer, y Intuitive. What Holds Us to Earth?: A Look at Gravity. 2017.
Precaución: Estas citas no son 100% exactas.