Gamma, E. (2020). Design Patterns (13th.). Pearson.
Chicago-čujuhus (17. p.)Gamma, Erich. Design Patterns. 13th. New Delhi: Pearson, 2020.
MLA-čujuhus (9. p.)Gamma, Erich. Design Patterns. 13th. Pearson, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.