Powers Gillette, H. (1920). Earthwork and its cost: A handbook of earth excavation. Mc Graw - Hill Book.
Chicago-čujuhus (17. p.)Powers Gillette, Halbert. Earthwork and Its Cost: A Handbook of Earth Excavation. London: Mc Graw - Hill Book, 1920.
MLA-čujuhus (9. p.)Powers Gillette, Halbert. Earthwork and Its Cost: A Handbook of Earth Excavation. Mc Graw - Hill Book, 1920.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.