Gaya APA
Russell, B.
(1951).
An outline of philosophy. (6th impr.). Oorspr.uitg. 1927
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London:
Allen & unwin.
Gaya MLA
Russell, B..
"An outline of philosophy. (6th impr.). Oorspr.uitg. 1927 ".
London:
Allen & unwin,
1951.
Buku.