Helms, Michael E., author
Prentice-Hall, 1990
Buku Referensi
edited by Thee Kian Wie
Indonesian Institute of Science, 2005
Buku Teks
Schwartz, Lita Linzer, author
Haworth Press, 2006
Buku Teks
Kelly, Gary F.
Dushkin Pub, 1992
Buku Referensi
Truman Simanjuntak ... [and others]
LIPI Press, 2006
Buku Teks