Hakikat Bisnis (Bagian Kedua)

Longmore, Jennifer Longmore., 88 Universal Laws, CreateSpace Independent Publishing Platform (June 12, 2015) 

Angelheart, Anne E., Twelve Universal Laws: The Truth That Will Transform Your Life, Balboa Press (July 31, 2007) 

Singh, Manhardeep Singh., 12 Laws of the Universe, Independently published (October 20, 2021) 

Randazzo, Dottie., 442 Cosmic & Universal Laws,  lulu.com (May 14, 2012) 

Tesla, Nikola., The Problem of Increasing Human Energy: With Special Reference to the Harnessing of the Sun's Energy, Cosimo Classics (January 1, 2008)