Παραπομπή APA

Grolier. (1971). The new book of knowledge: The children's encyclopedia. Grolier.

Παραπομπή Chicago Style

Grolier. The New Book of Knowledge: The Children's Encyclopedia. New York: Grolier, 1971.

Παραπομπή MLA

Grolier. The New Book of Knowledge: The Children's Encyclopedia. Grolier, 1971.