Citazione Stile APA (7a Edizione)

426028 Maxfield, J. E., & Maxfield, M. W. (1973). Keys to mathematics. Philadelphia, Pa. : W B Saunders.

Citazione stile Chigago Style (17a edizione)

426028 Maxfield, John E., e Margaret W. Maxfield. Keys to Mathematics. Philadelphia, Pa. : W B Saunders, 1973.

Citatione MLA (9a ed.)

426028 Maxfield, John E., e Margaret W. Maxfield. Keys to Mathematics. Philadelphia, Pa. : W B Saunders, 1973.