Hammer, A. (1988). Hammer Witness to History. Cent Hodder and Stoughton.
Chicago-čujuhus (17. p.)Hammer, Armand. Hammer Witness to History. Great Britain: Cent Hodder and Stoughton, 1988.
MLA-čujuhus (9. p.)Hammer, Armand. Hammer Witness to History. Cent Hodder and Stoughton, 1988.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.