格雷 & 哈里斯. (2011). 人人都有一块幸运石: Reallionaire nine steps to becoming rich from the inside out. 人民日报出版社.
Chicago (17e ed.) Bronvermelding格雷 en 哈里斯. 人人都有一块幸运石: Reallionaire Nine Steps to Becoming Rich from the Inside Out. 人民日报出版社, 2011.
MLA (8e ed.) Bronvermelding格雷 en 哈里斯. 人人都有一块幸运石: Reallionaire Nine Steps to Becoming Rich from the Inside Out. 人民日报出版社, 2011.
Let op: Deze citaties zijn niet altijd 100% accuraat.