Lumpkin, A. (2006). You can be positive, confident and courageous: Learn to lead a more meaningful life. Thinker's Library.
Čikaški stil citiranja (17. izdanje)Lumpkin, Aaron. You Can Be Positive, Confident and Courageous: Learn to Lead a More Meaningful Life. Batu Caves: Thinker's Library, 2006.
MLA način citiranja (8. izdanje)Lumpkin, Aaron. You Can Be Positive, Confident and Courageous: Learn to Lead a More Meaningful Life. Thinker's Library, 2006.
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