Willcox, J. (1892). On the evolution of the earth and the heavenly bodies. S.l..
Chicago (17e ed.) BronvermeldingWillcox, Joseph. On the Evolution of the Earth and the Heavenly Bodies. S.l., 1892.
MLA (8e ed.) BronvermeldingWillcox, Joseph. On the Evolution of the Earth and the Heavenly Bodies. S.l., 1892.
Let op: Deze citaties zijn niet altijd 100% accuraat.