Cita APA (7a ed.)
O'Connor, C., Mezgebu, S., & Zewdie, Z. (1993). Improving the efficiency of butter-making in Ethiopia.
Cita Chicago Style (17a ed.)
O'Connor, C.B, S. Mezgebu, y Z. Zewdie. Improving the Efficiency of Butter-making in Ethiopia. 1993.
Cita MLA (9a ed.)
O'Connor, C.B, et al. Improving the Efficiency of Butter-making in Ethiopia. 1993.
Precaución: Estas citas no son 100% exactas.