APA (7e ed.) Bronvermelding

Orr, A. (1991). A generalized model of economic constraints on crop turnaround time. International Rice Research Institute.

Chicago (17e ed.) Bronvermelding

Orr, Alastair. A Generalized Model of Economic Constraints on Crop Turnaround Time. Manila: International Rice Research Institute, 1991.

MLA (9e ed.) Bronvermelding

Orr, Alastair. A Generalized Model of Economic Constraints on Crop Turnaround Time. International Rice Research Institute, 1991.