Ralph Crouch
J. Wiley , 1965
Buku Teks
Devine, Donald F., author
John Wiley & Sons, 1983
Buku Teks
Beckmann, Sybilla, author
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., author
Macmillan, 1969
Buku Teks