Hancock, R. (1960). Puerto Rico, a success story. Van Nostrand.
Chicagoスタイル(17版)引用形式Hancock, Ralph. Puerto Rico, a Success Story. Princeton, N. J: Van Nostrand, 1960.
MLA(9版)引用形式Hancock, Ralph. Puerto Rico, a Success Story. Van Nostrand, 1960.
警告: この引用は必ずしも正確ではありません.