Wattles, W. D. (2005). The science of getting richCara ilmiah menjadi kayaWallace D. Wattles, penerjemah Sri Narulita Yusron. Quills book publisher.
Čikaški stil citiranja (17. izdanje)Wattles, Wallace D. The Science of Getting RichCara Ilmiah Menjadi KayaWallace D. Wattles, Penerjemah Sri Narulita Yusron. Quills book publisher, 2005.
MLA način citiranja (8. izdanje)Wattles, Wallace D. The Science of Getting RichCara Ilmiah Menjadi KayaWallace D. Wattles, Penerjemah Sri Narulita Yusron. Quills book publisher, 2005.
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