Haeckel, E., & McCabe, J. (1905). The wonders of life: A popular study of biological philosophy. Harper & brothers.
Chicago-viite (17. p.)Haeckel, Ernst, ja Joseph McCabe. The Wonders of Life: A Popular Study of Biological Philosophy. New York, London: Harper & brothers, 1905.
MLA-viite (8. p.)Haeckel, Ernst, ja Joseph McCabe. The Wonders of Life: A Popular Study of Biological Philosophy. Harper & brothers, 1905.
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