Obioh, G. I. B., & Isichei, A. O. (2014). Specprof: A Tool for Biological Indexing. Nigerian Conservation Foundation (NCF).
Lua i Stíl Chicago (17ú heag.)Obioh, Gloria I. B., agus Augustine O. Isichei. Specprof: A Tool for Biological Indexing. Nigerian Conservation Foundation (NCF), 2014.
Lua MLA (9ú heag.)Obioh, Gloria I. B., agus Augustine O. Isichei. Specprof: A Tool for Biological Indexing. Nigerian Conservation Foundation (NCF), 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.