Anderson, Donald L.
John Wiley & Sons, 1978
Buku Teks
Uchtmann, Donald L.
Mc-Graw Hill, 1981
Buku Teks
Robinson, Donald L.
Westview Press, 1989
Buku Teks SO
Wiedner, Donald L. Donal Lawrence)
Random House, 1962
Buku Teks SO
Driedger, Elmer A.
Edmond Cloutier, 1957
Buku Teks SO