Dyfyniad APA

Society of Economic Geologists. (1909). Economic Geology Vol.4 Nos.1-8.

Dyfyniad Arddull Chicago

Society of Economic Geologists. Economic Geology Vol.4 Nos.1-8. Economic Geology Publishing Co, 1909.

Dyfyniad MLA

Society of Economic Geologists. Economic Geology Vol.4 Nos.1-8. 1909.

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