APA-čujuhus (7. p.)
Scriba, C. J. (1968). The concept of number. Hochschulskripten bibliographisches institut (B.I.).
Chicago-čujuhus (17. p.)
Scriba, Christoph J. The Concept of Number. Hochschulskripten bibliographisches institut (B.I.), 1968.
MLA-čujuhus (9. p.)
Scriba, Christoph J. The Concept of Number. Hochschulskripten bibliographisches institut (B.I.), 1968.
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