Grätzer, G. (1971). Lattice Theory: First Concepts. W.H. Freeman.
Chicago-čujuhus (17. p.)Grätzer, George. Lattice Theory: First Concepts. San Francisco: W.H. Freeman, 1971.
MLA-čujuhus (9. p.)Grätzer, George. Lattice Theory: First Concepts. W.H. Freeman, 1971.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.