Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.