Rupp, R. (2006). Four elements: Water, air, fire, earth. Profile books.
Chicago Edition CitationRupp, Rebecca. Four Elements: Water, Air, Fire, Earth. London: Profile books, 2006.
MLA引文Rupp, Rebecca. Four Elements: Water, Air, Fire, Earth. Profile books, 2006.
警告:這些引文格式不一定是100%准確.