Cita APA (7th ed.)

Levine, S., Chui, T., & Grafton, A. (1992). Projects for a healthy planet: Simple environmental experiments for kids. Wiley.

Cita Chicago (17th ed.)

Levine, Shar, Terry Chui, i Allison Grafton. Projects for a Healthy Planet: Simple Environmental Experiments for Kids. New York: Wiley, 1992.

Cita MLA (9th ed.)

Levine, Shar, et al. Projects for a Healthy Planet: Simple Environmental Experiments for Kids. Wiley, 1992.