(1963). The world book encyclopedia. Vol.20: Reading and study guide. Chicago: Field Enterprises Educational Corporation.
استشهاد بنمط شيكاغوThe World Book Encyclopedia. Vol.20: Reading and Study Guide. Chicago: Field Enterprises Educational Corporation, 1963.
MLA استشهادThe World Book Encyclopedia. Vol.20: Reading and Study Guide. Chicago: Field Enterprises Educational Corporation, 1963.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.