Cita APA (7th ed.)

Lachecki, M., & Olson, C. (1991). Teaching kids to love the earth. Pfeifer-Hamilton.

Cita Chicago (17th ed.)

Lachecki, Marina, i Carolyn Olson. Teaching Kids to Love the Earth. Duluth, Minn: Pfeifer-Hamilton, 1991.

Cita MLA (9th ed.)

Lachecki, Marina, i Carolyn Olson. Teaching Kids to Love the Earth. Pfeifer-Hamilton, 1991.