Curtis, D. (1961). Your thoughts can change your life. Wilshire Book Co.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCurtis, Donald. Your Thoughts Can Change Your Life. Wilshire Book Co, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCurtis, Donald. Your Thoughts Can Change Your Life. Wilshire Book Co, 1961.
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