Gangel, K. O. (1974). Competent to lead. Moody Press.
Chicago-čujuhus (17. p.)Gangel, Kenneth O. Competent to Lead. Moody Press, 1974.
MLA-čujuhus (9. p.)Gangel, Kenneth O. Competent to Lead. Moody Press, 1974.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.