APA (7th ed.) Citation

Pettofrezo, A. J. (1969). Elementary Mathematics: Number systems and algebra. Scott, Foresman and company.

Chicago Style (17th ed.) Citation

Pettofrezo, Anthony J. Elementary Mathematics: Number Systems and Algebra. Glenview, Illinois: Scott, Foresman and company, 1969.

MLA (9th ed.) Citation

Pettofrezo, Anthony J. Elementary Mathematics: Number Systems and Algebra. Scott, Foresman and company, 1969.

Warning: These citations may not always be 100% accurate.