Gawdat, M. (2017). Solve for happy: Engineering your path to joy (First North Star Way hardcover edition.). North Star Way.
Цитирование в стиле Чикаго (17-е изд.)Gawdat, Mo. Solve for Happy: Engineering Your Path to Joy. First North Star Way hardcover edition. New York: North Star Way, 2017.
Цитирование MLA (8-е изд.)Gawdat, Mo. Solve for Happy: Engineering Your Path to Joy. First North Star Way hardcover edition. North Star Way, 2017.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.