Smith, H. W. (1994). The 10 natural laws of successful time and life management: Proven strategies for increased productivity and inner peace. Warner Books.
Citace podle Chicago (17th ed.)Smith, Hyrum W. The 10 Natural Laws of Successful Time and Life Management: Proven Strategies for Increased Productivity and Inner Peace. New York, NY: Warner Books, 1994.
Citace podle MLA (9th ed.)Smith, Hyrum W. The 10 Natural Laws of Successful Time and Life Management: Proven Strategies for Increased Productivity and Inner Peace. Warner Books, 1994.
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