Powers Gillette, H. (1920). Earthwork and its cost: A handbook of earth excavation. Mc Graw - Hill Book.
Chicagoスタイル(17版)引用形式Powers Gillette, Halbert. Earthwork and Its Cost: A Handbook of Earth Excavation. London: Mc Graw - Hill Book, 1920.
MLA(9版)引用形式Powers Gillette, Halbert. Earthwork and Its Cost: A Handbook of Earth Excavation. Mc Graw - Hill Book, 1920.
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