Cita APA (7th ed.)

Bonnet, R. L. (1990). Environmental science: 49 science fair projects. Tab Books.

Cita Chicago (17th ed.)

Bonnet, Robert L. Environmental Science: 49 Science Fair Projects. Blue Ridge Summit, PA: Tab Books, 1990.

Cita MLA (9th ed.)

Bonnet, Robert L. Environmental Science: 49 Science Fair Projects. Tab Books, 1990.