Dyfyniad APA

Porcelli, D., Stone, J., & O'Nions, R. (1987). Enhanced 3He 4He ratios and cosmogenic helium in ultramafic xenoliths.

Dyfyniad Arddull Chicago

Porcelli, DR, J. Stone, and R. O'Nions. Enhanced 3He 4He Ratios and Cosmogenic Helium in Ultramafic Xenoliths. 1987.

Dyfyniad MLA

Porcelli, DR, et al. Enhanced 3He 4He Ratios and Cosmogenic Helium in Ultramafic Xenoliths. 1987.

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