Fontana, D. (1989). Managing Stress. Excel Books.
Chicago-čujuhus (17. p.)Fontana, David. Managing Stress. New Delhi: Excel Books, 1989.
MLA-čujuhus (9. p.)Fontana, David. Managing Stress. Excel Books, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.