Philippines. Bureau of Agricultural Statistics. (2000). Costs and returns of ampalaya production. Bureau of Agricultural Statistics.
Chicago-Zitierstil (17. Ausg.)Philippines. Bureau of Agricultural Statistics. Costs and Returns of Ampalaya Production. Quezon City: Bureau of Agricultural Statistics, 2000.
MLA-Zitierstil (9. Ausg.)Philippines. Bureau of Agricultural Statistics. Costs and Returns of Ampalaya Production. Bureau of Agricultural Statistics, 2000.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.