Cita APA (7a ed.)

Ehrlich, R. (2001). Nine crazy ideas in science: A few might even be true. Princeton University Press.

Cita Chicago Style (17a ed.)

Ehrlich, Robert. Nine Crazy Ideas in Science: A Few Might Even Be True. Princeton, N.J.: Princeton University Press, 2001.

Cita MLA (9a ed.)

Ehrlich, Robert. Nine Crazy Ideas in Science: A Few Might Even Be True. Princeton University Press, 2001.