Cita APA (7th ed.)

Powers Gillette, H. (1920). Earthwork and its cost: A handbook of earth excavation. Mc Graw - Hill Book.

Cita Chicago (17th ed.)

Powers Gillette, Halbert. Earthwork and Its Cost: A Handbook of Earth Excavation. London: Mc Graw - Hill Book, 1920.

Cita MLA (9th ed.)

Powers Gillette, Halbert. Earthwork and Its Cost: A Handbook of Earth Excavation. Mc Graw - Hill Book, 1920.