Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.