Dyfyniad APA

Engle. The X-15 Rocket Plane. University of Nebraska Press.

Dyfyniad Arddull Chicago

Engle. The X-15 Rocket Plane. University of Nebraska Press.

Dyfyniad MLA

Engle. The X-15 Rocket Plane. University of Nebraska Press.

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