Dyfyniad APA

P, J. (1984). Heath Science James P. Barufaldi; George T. Ladd; Alice Johnson Moses. DC Heath and Company.

Dyfyniad Arddull Chicago

P, James. Heath Science James P. Barufaldi; George T. Ladd; Alice Johnson Moses. DC Heath and Company, 1984.

Dyfyniad MLA

P, James. Heath Science James P. Barufaldi; George T. Ladd; Alice Johnson Moses. DC Heath and Company, 1984.

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