Guenther, Robert D.
John Wiley & Sons, 1990
Buku Teks
Meyer-Arendt, Jurgen R.
Prentice-Hall, 1989
Buku Teks
Jenkins, Francis A.
McGraw-Hill, 1957
Buku Teks
Universitas Indonesia, 1992
UI - Skripsi (Membership)
Universitas Indonesia, 1992
UI - Skripsi (Membership)