Não informado. (1941). Agricultura experimental. University of Puerto Rico, Agricultural Experiment Station.
Chicago-Zitierstil (17. Ausg.)Não informado. Agricultura Experimental. Rio Piedras, Porto Rico: University of Puerto Rico, Agricultural Experiment Station, 1941.
MLA-Zitierstil (8. Ausg.)Não informado. Agricultura Experimental. University of Puerto Rico, Agricultural Experiment Station, 1941.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.