Cummings, Michael R.
Human heredity : principles and issues
Brooks/Cole, Cengage Learning, 2011
 Buku Teks
American principles and issues
edited by Oscar Handlin
Holt, Rinehart and Winston, 1961
 Buku Teks
Bennett, A. LeRoy
International organizations: principles and issues
Prentice-Hall, 1977
 Buku Teks
Jarvis, Peter J.
Ecological principles and environmental issues
Prentice-Hall, 2000
 Buku Teks
Granof, Michael H.
Financial accounting : principles and issues
Prentice-Hall, 1991
 Buku Teks