Thomas, David A.
Allyn and Bacon, 1991
Buku Teks
Beckmann, Sybilla
Pearson Addison Wesley, 2008
Buku Teks
Phares Odaffer, Randall Charles, Thomas Cooney, John Dossey, Jane Schielack
Pearson Addison Wesley, 2008
Buku Teks
Garstens, Helen L.
Macmillan, 1969
Buku Teks
Sullivan, Peter, 1948-
Springer, 2013
Buku Teks