APA (7th ed.) Zitazioa

PETTOFREZZO, A. J. (1969). Number systems ; structure and: Properties. Scott, Foresman.

Chicago Style (17th ed.) Zitazioa

PETTOFREZZO, Anthony J. Number Systems ; Structure and: Properties. Glenview, Ill: Scott, Foresman, 1969.

MLA (9th ed.) Zitazioa

PETTOFREZZO, Anthony J. Number Systems ; Structure and: Properties. Scott, Foresman, 1969.