Brubaker, O. J. (1972). Understanding people. Evangelical Teacher Training Association.
Chicago-čujuhus (17. p.)Brubaker, Omar J. Understanding People. Evangelical Teacher Training Association, 1972.
MLA-čujuhus (9. p.)Brubaker, Omar J. Understanding People. Evangelical Teacher Training Association, 1972.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.