Ukpe, U.H. i Ewung, B.F. 2023. Determinants of Demand and Participation by Poultry Farmers in Formal and Informal Credit Markets in Cross River State, Nigeria. Zeszyty Naukowe SGGW w Warszawie - Problemy Rolnictwa Światowego. 23, 4 (grudz. 2023), 31–43. DOI:https://doi.org/10.22630/PRS.2023.23.4.15.