Oettinger, Anthony G.
Harvard University Press, 1960
Buku Teks SO
Beach, David P.
Prentice-Hall, 1992
Buku Referensi
Williams, Edwin B.
D.C. Health, 1926
Buku Teks SO
Morris, Jackson E.
McGraw-Hill, 1966
Buku Teks SO
Ching-Chih, Chen
MIT Press, 1977
Buku Teks SO