Schmidgen, H., & Schott, N. F. (2014). The Helmholtz curves: Tracing lost time (First edition.). Fordham University Press.
Citace podle Chicago (17th ed.)Schmidgen, Henning, a Nils F. Schott. The Helmholtz Curves: Tracing Lost Time. First edition. New York: Fordham University Press, 2014.
Citace podle MLA (9th ed.)Schmidgen, Henning, a Nils F. Schott. The Helmholtz Curves: Tracing Lost Time. First edition. Fordham University Press, 2014.
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