Dyfyniad APA

(1990). Proceedings earth and planetary sciences, 1990, Vol.99, No.01-04.

Dyfyniad Arddull Chicago

Proceedings Earth and Planetary Sciences, 1990, Vol.99, No.01-04. Indian Academy of Science, Bangalore, 1990.

Dyfyniad MLA

Proceedings Earth and Planetary Sciences, 1990, Vol.99, No.01-04. 1990.

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