Παραπομπή σε μορφή APA (7η εκδ.)

Ero, I. I., & Sanford, W. W. (2014). Guinea Savanna Structure and Land-use in Northwestern Nigeria. Obafemi Awolowo University.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ero, Isaac Izogie, και W. W. Sanford. Guinea Savanna Structure and Land-use in Northwestern Nigeria. Obafemi Awolowo University, 2014.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ero, Isaac Izogie, και W. W. Sanford. Guinea Savanna Structure and Land-use in Northwestern Nigeria. Obafemi Awolowo University, 2014.