Nichols, Eugene D.
Holt, Rinehart and Winston, 1971
Buku Teks
Devine, Donald F.
John Wiley & Sons, 1983
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