Gaya APA
Bak, F, M, O, C. ().
Alfred Jules Ayer's criterion of verifiability. Disertasi Acad.Alfonsiana. .
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Gaya MLA
Bak, Felix, M.,, OFM, Conv..
"Alfred Jules Ayer's criterion of verifiability. Disertasi Acad.Alfonsiana. ".
Padua:
1970,
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Buku.