Dyfyniad APA

Medina, J. (1991). The outer limits of life. Oliver Nelson.

Dyfyniad Arddull Chicago

Medina, John. The Outer Limits of Life. Nashville, TN: Oliver Nelson, 1991.

Dyfyniad MLA

Medina, John. The Outer Limits of Life. Oliver Nelson, 1991.

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