Harvey, E. N. (1920). Nature of animal light. J.B. Lippincott company.
Lua i Stíl Chicago (17ú heag.)Harvey, E. Newton. Nature of Animal Light. Philadelphia: J.B. Lippincott company, 1920.
Lua MLA (9ú heag.)Harvey, E. Newton. Nature of Animal Light. J.B. Lippincott company, 1920.
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