Tohutoro APA (7th ed.)
Hellwald, F. v. (1889). Die menschliche Familie.
Tohutoru Kātū Chicago (17th ed.)
Hellwald, Friedrich v. Die Menschliche Familie. Lpz, 1889.
Tohutoro MLA (9th ed.)
Hellwald, Friedrich v. Die Menschliche Familie. 1889.
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