Sanders, J. (2018). The free-time formula: Finding happiness, focus, and productivity no matter how busy you are. Wiley.
Citace podle Chicago (17th ed.)Sanders, Jeff. The Free-time Formula: Finding Happiness, Focus, and Productivity No Matter How Busy You Are. Hoboken, New Jersey: Wiley, 2018.
Citace podle MLA (9th ed.)Sanders, Jeff. The Free-time Formula: Finding Happiness, Focus, and Productivity No Matter How Busy You Are. Wiley, 2018.
Upozornění: Tyto citace jsou generovány automaticky. Nemusí být zcela správně podle citačních pravidel..