APA-Zitierstil (7. Ausg.)

Earth Works Group (U.S.). (1990). 50 simple things kids can do to save the earth. Andrews and McMeel.

Chicago-Zitierstil (17. Ausg.)

Earth Works Group (U.S.). 50 Simple Things Kids Can Do to Save the Earth. Kansas City, MO: Andrews and McMeel, 1990.

MLA-Zitierstil (9. Ausg.)

Earth Works Group (U.S.). 50 Simple Things Kids Can Do to Save the Earth. Andrews and McMeel, 1990.