Dyfyniad APA

President Ronald Reagan's Speech on the Challenger Disaster. Great Neck Publishing.

Dyfyniad Arddull Chicago

President Ronald Reagan's Speech on the Challenger Disaster. Great Neck Publishing.

Dyfyniad MLA

President Ronald Reagan's Speech on the Challenger Disaster. Great Neck Publishing.

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