Cita APA

(1963). The world book encyclopedia. Vol.20: Reading and study guide. Chicago: Field Enterprises Educational Corporation.

Citación estilo Chicago

The World Book Encyclopedia. Vol.20: Reading and Study Guide. Chicago: Field Enterprises Educational Corporation, 1963.

Cita MLA

The World Book Encyclopedia. Vol.20: Reading and Study Guide. Chicago: Field Enterprises Educational Corporation, 1963.