LAKEIN ALAN. (1974). HOW TO GET CONTROL OF YOUR TIME & YOUR LIFE. SIGNET BOOK.
Čikaški stil citiranja (17. izdanje)LAKEIN ALAN. HOW TO GET CONTROL OF YOUR TIME & YOUR LIFE. NEW YORK: SIGNET BOOK, 1974.
MLA način citiranja (9. izdanje)LAKEIN ALAN. HOW TO GET CONTROL OF YOUR TIME & YOUR LIFE. SIGNET BOOK, 1974.
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