Dyfyniad APA

Brown, S. B. (1972). Realm of science ( 21 Vols.): :vol.16 the substance of our world: earth ,water and air. Touchstone.

Dyfyniad Arddull Chicago

Brown, Stanley. B. Realm of Science ( 21 Vols.): :vol.16 the Substance of Our World: Earth ,water and Air. USA: Touchstone, 1972.

Dyfyniad MLA

Brown, Stanley. B. Realm of Science ( 21 Vols.): :vol.16 the Substance of Our World: Earth ,water and Air. Touchstone, 1972.

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