Wolf Tony. (2009). The book of the earth, many questions and many answers. Euro Books.
Chicago (17e ed.) BronvermeldingWolf Tony. The Book of the Earth, Many Questions and Many Answers. Mumbai: Euro Books, 2009.
MLA (9e ed.) BronvermeldingWolf Tony. The Book of the Earth, Many Questions and Many Answers. Euro Books, 2009.
Let op: Deze citaties zijn niet altijd 100% accuraat.