Leff, H. L. (1978). Experience, environment, and human potentials. Oxford University Press.
Chicago-čujuhus (17. p.)Leff, Herbert L. Experience, Environment, and Human Potentials. New York: Oxford University Press, 1978.
MLA-čujuhus (9. p.)Leff, Herbert L. Experience, Environment, and Human Potentials. Oxford University Press, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.