Offem, B. O. (2008). Diet, size and reproductive biology of the silver catfish, Chrysichthys nigrodigitatus (Siluformes: Bagridae) in the Cross River, Nigeria. Universidad de Costa Rica.
Citazione stile Chigago Style (17a edizione)Offem, Benedict Obeten. Diet, Size and Reproductive Biology of the Silver Catfish, Chrysichthys Nigrodigitatus (Siluformes: Bagridae) in the Cross River, Nigeria. Universidad de Costa Rica, 2008.
Citatione MLA (9a ed.)Offem, Benedict Obeten. Diet, Size and Reproductive Biology of the Silver Catfish, Chrysichthys Nigrodigitatus (Siluformes: Bagridae) in the Cross River, Nigeria. Universidad de Costa Rica, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.