APA

Graham I., .World of wonder. Machines and inventions. New York, Estados Unidos: Scholastic, Children's Press.

Chicago

Graham Ian, .World of wonder. Machines and inventions. New York, Estados Unidos: Scholastic, Children's Press.

Harvard

Graham I., .World of wonder. Machines and inventions. New York, Estados Unidos: Scholastic, Children's Press.

MLA

Graham Ian, .New York, Estados Unidos: Scholastic, Children's Press. .