Cita APA (7a ed.)
Marble, A., & Fritschel, H. (2014). Public agricultural R&D spending in Africa south of the Sahara, 2000 and 2011. International Food Policy Research Institute.
Cita Chicago Style (17a ed.)
Marble, Andrew, y Heidi Fritschel. Public Agricultural R&D Spending in Africa South of the Sahara, 2000 and 2011. International Food Policy Research Institute, 2014.
Cita MLA (9a ed.)
Marble, Andrew, y Heidi Fritschel. Public Agricultural R&D Spending in Africa South of the Sahara, 2000 and 2011. International Food Policy Research Institute, 2014.
Precaución: Estas citas no son 100% exactas.