Cita APA (7th ed.)
Obaje, N. G. (2009). Geology and Mineral Resources of Nigeria. Springer Berlin Heidelberg. https://doi.org/10.1007/978-3-540-92685-6
Cita Chicago (17th ed.)
Obaje, Nuhu George. Geology and Mineral Resources of Nigeria. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. https://doi.org/10.1007/978-3-540-92685-6.
Cita MLA (9th ed.)
Obaje, Nuhu George. Geology and Mineral Resources of Nigeria. Springer Berlin Heidelberg, 2009. https://doi.org/10.1007/978-3-540-92685-6.
Atenció: Aquestes cites poden no estar 100% correctes.