Dyfyniad APA

Greely, R. (1994). Planetary landscape: :2nd ed (2nd ed.). Chapman & Hall.

Dyfyniad Arddull Chicago

Greely, Ronald. Planetary Landscape: :2nd Ed. 2nd ed. New York: Chapman & Hall, 1994.

Dyfyniad MLA

Greely, Ronald. Planetary Landscape: :2nd Ed. 2nd ed. Chapman & Hall, 1994.

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