Wilson, A. (1961). The old men at the zoo. Seeker & Warburg.
Chicago-čujuhus (17. p.)Wilson, Angus. The Old Men at the Zoo. London: Seeker & Warburg, 1961.
MLA-čujuhus (9. p.)Wilson, Angus. The Old Men at the Zoo. Seeker & Warburg, 1961.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.