Ryan, M. J. (1999). Attitudes of gratitude: How to give and receive joy every day of your life. Conari Press.
Čikaški stil citiranja (17. izdanje)Ryan, M. J. Attitudes of Gratitude: How to Give and Receive Joy Every Day of Your Life. Berkeley, Calif: Conari Press, 1999.
MLA način citiranja (9. izdanje)Ryan, M. J. Attitudes of Gratitude: How to Give and Receive Joy Every Day of Your Life. Conari Press, 1999.
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