Dyfyniad APA

Featherstonhaugh, G. W. (1831). The Monthly American journal of geology and natural science. Henry H. Porter.

Dyfyniad Arddull Chicago

Featherstonhaugh, George William. The Monthly American Journal of Geology and Natural Science. Philadelphia: Henry H. Porter, 1831.

Dyfyniad MLA

Featherstonhaugh, George William. The Monthly American Journal of Geology and Natural Science. Henry H. Porter, 1831.

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