Halstead, L. B. (2013). Ife and Biology. Obafemi Awolowo University Press.
Lua i Stíl Chicago (17ú heag.)Halstead, L. B. Ife and Biology. Obafemi Awolowo University Press, 2013.
Lua MLA (9ú heag.)Halstead, L. B. Ife and Biology. Obafemi Awolowo University Press, 2013.
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