Spiess, L. B. (1947). Polyphony in theory and practice from the ninth century to the close of the thirteenth century: [Phil. Diss. Harvard Univ. Cambridge/Mass. 1947] [Mikrofilm, 35 mm, Pos. - Cambridge/Mass. 1964: Univ. Library]. [s.t.].
Chicago-Zitierstil (17. Ausg.)Spiess, Lincoln Bunce. Polyphony in Theory and Practice from the Ninth Century to the Close of the Thirteenth Century: [Phil. Diss. Harvard Univ. Cambridge/Mass. 1947] [Mikrofilm, 35 Mm, Pos. - Cambridge/Mass. 1964: Univ. Library]. [Cambridge/Mass.]: [s.t.], 1947.
MLA-Zitierstil (9. Ausg.)Spiess, Lincoln Bunce. Polyphony in Theory and Practice from the Ninth Century to the Close of the Thirteenth Century: [Phil. Diss. Harvard Univ. Cambridge/Mass. 1947] [Mikrofilm, 35 Mm, Pos. - Cambridge/Mass. 1964: Univ. Library]. [s.t.], 1947.