Dyfyniad APA

Russel, B. (1956). Logic and Knowledge, Essays 1901 - 1950. George Allen & Unwin.

Dyfyniad Arddull Chicago

Russel, Bertrand. Logic and Knowledge, Essays 1901 - 1950. London: George Allen & Unwin, 1956.

Dyfyniad MLA

Russel, Bertrand. Logic and Knowledge, Essays 1901 - 1950. George Allen & Unwin, 1956.

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