Dyfyniad APA

Lewis, D., & Greene, J. (1982). Thinking better (ed.). McClelland and Stewart.

Dyfyniad Arddull Chicago

Lewis, David, and James Greene. Thinking Better. ed. Canada: McClelland and Stewart, 1982.

Dyfyniad MLA

Lewis, David, and James Greene. Thinking Better. ed. McClelland and Stewart, 1982.

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