APA (7e ed.) Bronvermelding

Philippine Rice Research Institute. (2009). OPAPA: The Open Academy for Philippine Agriculture : an innovation in accessing modern agricultural technologies. Philippine Rice Research Institute.

Chicago (17e ed.) Bronvermelding

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.

MLA (9e ed.) Bronvermelding

Philippine Rice Research Institute. OPAPA: The Open Academy for Philippine Agriculture : An Innovation in Accessing Modern Agricultural Technologies. Philippine Rice Research Institute, 2009.