Transportation Research Board, National Research Council, 1985
Buku Referensi
edited by Robert F. Baker, L.G. Byrd and D. Grant Mickle
Van Nostrand Reinhold, 1975
Buku Referensi
Wright, Paul H., author
John Wiley & Sons, 2004
Buku Teks
Oglesby, Clarkson H. (Clarkson Hill), 1908-, author
John Wiley & Sons, 1963
Buku Teks
Singh, Gurcharn, author
Standard Publishers Distributors, 1978
Buku Teks