Dyfyniad APA

(1990). Nova Chemical Corporation. Harvard Business School.

Dyfyniad Arddull Chicago

Nova Chemical Corporation. Boston, [Massachusetts]: Harvard Business School, 1990.

Dyfyniad MLA

Nova Chemical Corporation. Harvard Business School, 1990.

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