(1963). The world book encyclopedia. Vol.20: Reading and study guide. Chicago: Field Enterprises Educational Corporation.
Čikaški stil citiranjaThe World Book Encyclopedia. Vol.20: Reading and Study Guide. Chicago: Field Enterprises Educational Corporation, 1963.
MLA način citiranjaThe World Book Encyclopedia. Vol.20: Reading and Study Guide. Chicago: Field Enterprises Educational Corporation, 1963.
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