Howard, R. (1980). Christian maturity. Cowman Publications,Inc..
Chicago-čujuhus (17. p.)Howard, Rick. Christian Maturity. Los Angeles 38: Cowman Publications,Inc., 1980.
MLA-čujuhus (9. p.)Howard, Rick. Christian Maturity. Cowman Publications,Inc., 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.