Παραπομπή σε μορφή APA (7η εκδ.)

Smith, H. W. (1994). The 10 natural laws of successful time and life management: Proven strategies for increased productivity and inner peace. Warner Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

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.

Παραπομπή σε μορφή MLA (9th εκδ.)

Smith, Hyrum W. The 10 Natural Laws of Successful Time and Life Management: Proven Strategies for Increased Productivity and Inner Peace. Warner Books, 1994.