Singer, Ferdinand L., author
New York: Harper and Row, 1975
Buku Teks
Langhaar, H.L., author
McGraw-Hill, 1959
Buku Teks
Hibbeler, R. C., author
Macmillan, 1983
Buku Teks
Gray, Gary L, author
McGraw-Hill, 2010
Buku Teks
Hibbeler, R. C., author
Prentice-Hall, 1997
Buku Teks