Griffith, S. (2018). The Time Cleanse:: A Proven System to Eliminate Wasted Time, Realize Your Full Potential, and Reinvest in What Matters Most (1st edition.). McGraw-Hill.
Chicago-Zitierstil (17. Ausg.)Griffith, Steven. The Time Cleanse:: A Proven System to Eliminate Wasted Time, Realize Your Full Potential, and Reinvest in What Matters Most. 1st edition. McGraw-Hill, 2018.
MLA-Zitierstil (8. Ausg.)Griffith, Steven. The Time Cleanse:: A Proven System to Eliminate Wasted Time, Realize Your Full Potential, and Reinvest in What Matters Most. 1st edition. McGraw-Hill, 2018.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.