Gaya APA
Popper, K.
(-1969).
The poverty of historicism, (repr.). Tjet.pertama 1957.
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London:
Routledge.
Gaya MLA
Popper, K.R..
"The poverty of historicism, (repr.). Tjet.pertama 1957. ".
London:
Routledge,
-1969.
Buku.