Pennington, S. (2020). Benjamin Wright: Father of American civil engineering. American Society of Civil Engineering.
Citace podle Chicago (17th ed.)Pennington, Steven. Benjamin Wright: Father of American Civil Engineering. Reston, Virginia: American Society of Civil Engineering, 2020.
Citace podle MLA (9th ed.)Pennington, Steven. Benjamin Wright: Father of American Civil Engineering. American Society of Civil Engineering, 2020.
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