Παραπομπή σε μορφή APA (7η εκδ.)

Wolf Tony. (2009). The book of the earth, many questions and many answers. Euro Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wolf Tony. The Book of the Earth, Many Questions and Many Answers. Mumbai: Euro Books, 2009.

Παραπομπή σε μορφή MLA (9th εκδ.)

Wolf Tony. The Book of the Earth, Many Questions and Many Answers. Euro Books, 2009.