Dilley, C. A., Rucker, W. E., & Jackson, A. E. (1972). Heath elementary mathematics. Heath.
Cita Chicago Style (17a ed.)Dilley, Clyde A., Walter E. Rucker, y Ann E. Jackson. Heath Elementary Mathematics. Lexington: Heath, 1972.
Cita MLA (8a ed.)Dilley, Clyde A., et al. Heath Elementary Mathematics. Heath, 1972.
Precaución: Estas citas no son 100% exactas.