Ero, I. I., & Sanford, W. W. (2014). Guinea Savanna Structure and Land-use in Northwestern Nigeria. Obafemi Awolowo University.
Cita Chicago (17th ed.)Ero, Isaac Izogie, i W. W. Sanford. Guinea Savanna Structure and Land-use in Northwestern Nigeria. Obafemi Awolowo University, 2014.
Cita MLA (9th ed.)Ero, Isaac Izogie, i W. W. Sanford. Guinea Savanna Structure and Land-use in Northwestern Nigeria. Obafemi Awolowo University, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.