D'Wolf, J. (1965). A voyage to the North Pacific and a journey through Siberia, more than half a century ago. Research Publications.
Dyfyniad Arddull ChicagoD'Wolf, John. A Voyage to the North Pacific and a Journey Through Siberia, More than Half a Century Ago. New Haven, Conn.: Research Publications, 1965.
Dyfyniad MLAD'Wolf, John. A Voyage to the North Pacific and a Journey Through Siberia, More than Half a Century Ago. Research Publications, 1965.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.