Philippines. Bureau of Agricultural Research. (1990). On-farm research manual. Bureau of Agricultural Research, Department of Agriculture.
Citazione stile Chigago Style (17a edizione)Philippines. Bureau of Agricultural Research. On-farm Research Manual. Quezon City: Bureau of Agricultural Research, Department of Agriculture, 1990.
Citatione MLA (9a ed.)Philippines. Bureau of Agricultural Research. On-farm Research Manual. Bureau of Agricultural Research, Department of Agriculture, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.