APA ציטוט

Zeleny, R. O. (1974). The world book encyclopedia. Chicago: Field Enterprises Educational Corporation.

Παραπομπή Chicago Style

Zeleny, Robert O. The World Book Encyclopedia. Chicago: Field Enterprises Educational Corporation, 1974.

ציטוט MLA

Zeleny, Robert O. The World Book Encyclopedia. Chicago: Field Enterprises Educational Corporation, 1974.