Παραπομπή APA

Rupp, R. (2006). Four elements: Water, air, fire, earth. Profile books.

Παραπομπή Chicago Style

Rupp, Rebecca. Four Elements: Water, Air, Fire, Earth. London: Profile books, 2006.

Παραπομπή MLA

Rupp, Rebecca. Four Elements: Water, Air, Fire, Earth. Profile books, 2006.