Ewald, W. R. ,. (1967). Environment for Man: The Next Fifty Years. Bloomington ; London: Indiana University Press.
Chicago Stili AlıntıEwald, William R.. Environment for Man: The Next Fifty Years. Bloomington ; London: Indiana University Press, 1967.
MLA AlıntıEwald, William R.. Environment for Man: The Next Fifty Years. Bloomington ; London: Indiana University Press, 1967.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..