Clawson, C. (2004). Mathemtical mysteries. Viva.
Chicago Style aipamenaClawson, Calvin. Mathemtical Mysteries. New Delhi: Viva, 2004.
MLA aipamenaClawson, Calvin. Mathemtical Mysteries. Viva, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.