Dyfyniad APA

Robertson, W. C. (2005). Air, water, and weather. NSTA Press.

Dyfyniad Arddull Chicago

Robertson, William C. Air, Water, and Weather. Arlington, Va.: NSTA Press, 2005.

Dyfyniad MLA

Robertson, William C. Air, Water, and Weather. NSTA Press, 2005.

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