Theobald, D. (1968). Introduction to the philosophy of science. Methuen.
Dyfyniad Arddull ChicagoTheobald, D.W. Introduction to the Philosophy of Science. London: Methuen, 1968.
Dyfyniad MLATheobald, D.W. Introduction to the Philosophy of Science. Methuen, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.