Hakikat Bisnis (Bagian Pertama)

Al-Khushan, Muab ibn Muammad Ab Dharr, Shar al-Srah al-Nabawyah (v.1 & v.2): Riwyat Ibn Hishm, University of California Libraries (January 1, 1923) 

Szasz TS. The Myth of Mental Illness: Foundations of a Theory of Personal Conduct. Secker & Warburg, 1962.

Dirac, Paul A.M., The Principles of Quantum Mechanics, www.snowballpublishing.com (January 8, 2013) 

Saxby, Elliott. Masculine and Feminine Polarity Work: A Guide to Navigate Polarity, Duality, and Your Own Evolution, CH - Charter House Publications (September 2, 2019)

McGregor, Creed, Universal Laws: Unlocking the Secrets of the Universe: 7 Natural Laws of the Universe, CreateSpace Independent Publishing Platform (February 22, 2016) 

Milanovich, Dr. Norma J., Dr. Shirley McCune., The Light Shall Set You Free, Athena Publishing; Reprint edition (October 25, 1996) 

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)