Dyfyniad APA

Hapgood, C. H. (1970). The path of the pole (2nd ed.). Chilton.

Dyfyniad Arddull Chicago

Hapgood, Charles H. The Path of the Pole. 2nd ed. Philadelphia: Chilton, 1970.

Dyfyniad MLA

Hapgood, Charles H. The Path of the Pole. 2nd ed. Chilton, 1970.

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