APA Style

Koch, R. (2024). 80/20 daily : your day-by-day guide to happier, healthier, and more successful living using the 8020 principle . Great Britain: John Murray Publishers.

MLA Style

Koch, Richard. "80/20 daily : your day-by-day guide to happier, healthier, and more successful living using the 8020 principle". Great Britain: John Murray Publishers, 2024. Text.