Philippine Rice Research Institute. (2009). OPAPA: The Open Academy for Philippine Agriculture : an innovation in accessing modern agricultural technologies. Philippine Rice Research Institute.
Style de citation Chicago (17e éd.)Philippine Rice Research Institute. OPAPA: The Open Academy for Philippine Agriculture : An Innovation in Accessing Modern Agricultural Technologies. Nueva Ecija: Philippine Rice Research Institute, 2009.
Style de citation MLA (9e éd.)Philippine Rice Research Institute. OPAPA: The Open Academy for Philippine Agriculture : An Innovation in Accessing Modern Agricultural Technologies. Philippine Rice Research Institute, 2009.
Attention : ces citations peuvent ne pas être correctes à 100%.