Cita APA

Bonnet, R. L., & Keen, G. D. (1990). Earth science: 49 science fair projects. TAB Books.

Citación estilo Chicago

Bonnet, Robert L., and G. Daniel Keen. Earth Science: 49 Science Fair Projects. Blue Ridge Summit, PA: TAB Books, 1990.

Cita MLA

Bonnet, Robert L., and G. Daniel Keen. Earth Science: 49 Science Fair Projects. TAB Books, 1990.