Tohutoro APA (7th ed.)
Kopp, H. (1940). Zur Aetiologie der Spondylolisthesis. Edelmann.
Tohutoru Kātū Chicago (17th ed.)
Kopp, Hubert. Zur Aetiologie Der Spondylolisthesis. Leipzig: Edelmann, 1940.
Tohutoro MLA (9th ed.)
Kopp, Hubert. Zur Aetiologie Der Spondylolisthesis. Edelmann, 1940.
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