Não informado. (1934). Journal of Agriculture of the University of Puerto Rico. University of Puerto Rico, Agricultural Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. Journal of Agriculture of the University of Puerto Rico. Rio Piedras, Porto Rico: University of Puerto Rico, Agricultural Experiment Station, 1934.
MLA-Zitierstil (8. Ausg.)Não informado. Journal of Agriculture of the University of Puerto Rico. University of Puerto Rico, Agricultural Experiment Station, 1934.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.