Lange , O. (1969). Theory of Reproduction and Accumulation. PWN.
Cita Chicago (17th ed.)Lange , Oskar. Theory of Reproduction and Accumulation. Warsaw: PWN, 1969.
Cita MLA (9th ed.)Lange , Oskar. Theory of Reproduction and Accumulation. PWN, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.