Dyfyniad APA

Don Gray. (1977). What happens to food. MacDonald Educational.

Dyfyniad Arddull Chicago

Don Gray. What Happens to Food. London: MacDonald Educational, 1977.

Dyfyniad MLA

Don Gray. What Happens to Food. MacDonald Educational, 1977.

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