Heller, H. R. (1968). International trade theory and empirical evidence. Prentic- Hall.
Chicagoスタイル(17版)引用形式Heller, H. Robert. International Trade Theory and Empirical Evidence. NewJersey: Prentic- Hall, 1968.
MLA(9版)引用形式Heller, H. Robert. International Trade Theory and Empirical Evidence. Prentic- Hall, 1968.
警告: この引用は必ずしも正確ではありません.