Não informado. (1941). Agricultura experimental. University of Puerto Rico, Agricultural Experiment Station.
Chicagoスタイル(17版)引用形式Não informado. Agricultura Experimental. Rio Piedras, Porto Rico: University of Puerto Rico, Agricultural Experiment Station, 1941.
MLA(8版)引用形式Não informado. Agricultura Experimental. University of Puerto Rico, Agricultural Experiment Station, 1941.
警告: この引用は必ずしも正確ではありません.