APA (7th ed.) Zitazioa

Higgins, P. M. (2008). Number story: From counting to cryptography. Copernicus Books.

Chicago Style (17th ed.) Zitazioa

Higgins, Peter M. Number Story: From Counting to Cryptography. London: Copernicus Books, 2008.

MLA (9th ed.) Zitazioa

Higgins, Peter M. Number Story: From Counting to Cryptography. Copernicus Books, 2008.