Cita APA (7th ed.)
(1941). Specifications for construction of roads and bridges in national forests and national parks. US Gov. Pr. Off.
Cita Chicago (17th ed.)
Specifications for Construction of Roads and Bridges in National Forests and National Parks. Washington: US Gov. Pr. Off, 1941.
Cita MLA (9th ed.)
Specifications for Construction of Roads and Bridges in National Forests and National Parks. US Gov. Pr. Off, 1941.
Atenció: Aquestes cites poden no estar 100% correctes.