Flippo, Edwin B., author
McGraw-Hill Kogakusha, 1976
Buku Teks
Lovelock, Christopher H., author
Pearson Education international, 2002
Buku Teks
Bohlander, George W., author
South Western Cengage Learning, 2013
Buku Teks
by Arthur J. Keown, John D. Martin, J. William Petty, and David F. Scott
Prentice-Hall, 2005
Buku Teks
Komaruddin Sastradipoera, author
Kappa-Sigma Publishers, 2000
Buku Teks