APA-čujuhus (7. p.)
Barker, A. (2000). Scientific method in Ptolemy's Harmonics. Cambridge University Press.
Chicago-čujuhus (17. p.)
Barker, Andrew. Scientific Method in Ptolemy's Harmonics. Cambridge ; New York: Cambridge University Press, 2000.
MLA-čujuhus (9. p.)
Barker, Andrew. Scientific Method in Ptolemy's Harmonics. Cambridge University Press, 2000.
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