Não informado. (2000). Technical paper. University of Puerto Rico, Agricultural Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. Technical Paper. Rio Piedras, Porto Rico: University of Puerto Rico, Agricultural Experiment Station, 2000.
MLA-Zitierstil (8. Ausg.)Não informado. Technical Paper. University of Puerto Rico, Agricultural Experiment Station, 2000.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.