Obioh, G. I. B., & Isichei, A. O. (2014). Specprof: A Tool for Biological Indexing. Nigerian Conservation Foundation (NCF).
Cita Chicago (17th ed.)Obioh, Gloria I. B., i Augustine O. Isichei. Specprof: A Tool for Biological Indexing. Nigerian Conservation Foundation (NCF), 2014.
Cita MLA (9th ed.)Obioh, Gloria I. B., i Augustine O. Isichei. Specprof: A Tool for Biological Indexing. Nigerian Conservation Foundation (NCF), 2014.
Atenció: Aquestes cites poden no estar 100% correctes.