American Society of Civil Engineers, 1991
Buku Referensi
Barnet, Sylvan, author
Batsford Academic and Educational, 1985
Buku Teks
Barnet, Sylvan, author
Little, Brown, 1979
Buku Teks
W.W. Norton & Company, 1977
Buku Teks
Cooper, Harris M., author
Sage, 1989
Buku Teks