Kho, N. D. (2019). The thank-you project: Cultivating happiness one letter of gratitude at a time. Running Press.
Цитирование в стиле Чикаго (17-е изд.)Kho, Nancy Davis. The Thank-you Project: Cultivating Happiness One Letter of Gratitude at a Time. Philadelphia: Running Press, 2019.
Цитирование MLA (8-е изд.)Kho, Nancy Davis. The Thank-you Project: Cultivating Happiness One Letter of Gratitude at a Time. Running Press, 2019.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.