龚勋. (2010). 世界之最 上: Knowledge for students. 云南教育出版社.
Chicago Style (17th ed.) Citation龚勋. 世界之最 上: Knowledge for Students. 云南教育出版社, 2010.
Cita MLA龚勋. 世界之最 上: Knowledge for Students. 云南教育出版社, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.