(2015). O's little book of happiness (First edition.). Flatiron Books.
Chicago Style (17th ed.) CitationO's Little Book of Happiness. First edition. New York: Flatiron Books, 2015.
MLA引文O's Little Book of Happiness. First edition. Flatiron Books, 2015.
警告:這些引文格式不一定是100%准確.