Lydall, G. .. (1955). A Practical guide to precis writing & indexing. Macdonalds & Evans ltd.
Chicago-čujuhus (17. p.)Lydall, G .O. A Practical Guide to Precis Writing & Indexing. London: Macdonalds & Evans ltd, 1955.
MLA-čujuhus (9. p.)Lydall, G .O. A Practical Guide to Precis Writing & Indexing. Macdonalds & Evans ltd, 1955.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.