Ashaye, T. I. (2013). Soils, Civilisations and the March of Time. Obafemi Awolowo University Press.
Lua i Stíl Chicago (17ú heag.)Ashaye, T. I. Soils, Civilisations and the March of Time. Obafemi Awolowo University Press, 2013.
Lua MLA (9ú heag.)Ashaye, T. I. Soils, Civilisations and the March of Time. Obafemi Awolowo University Press, 2013.
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