Lewis, William Draper, author
Michie, 1937
Buku Teks
edited by Hasting Donnan
SAGE Publication, 2002
Buku Teks
Lippincott Williams & Wilkins , 2007
Buku Referensi
Hartshorn, Truman Asa, author
John Wiley & Sons, 1980
Buku Teks
edited by Vic Barnett
John Wiley & Sons, 1981
Buku Teks