Babbitt, Harold E. (Harold Eaton), 1888-, author
McGraw-Hill, 1960
Buku Teks
Cowles, 1996
Buku Referensi
Beckman, William A., author
John Wiley & Sons, c1977
Buku Teks
Ibnu Saba`at Darojat, author
2008
UI - Skripsi (Open)
Traister, John E., author
Prentice-Hall, 1988
Buku Teks