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