Dyfyniad APA

Schermeister, P., & Grove, N. (1999). Range of light: The Sierra Nevada. National Geographic.

Dyfyniad Arddull Chicago

Schermeister, Phil, and Noel Grove. Range of Light: The Sierra Nevada. Washington, D.C: National Geographic, 1999.

Dyfyniad MLA

Schermeister, Phil, and Noel Grove. Range of Light: The Sierra Nevada. National Geographic, 1999.

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