McGarry, Daniel D.
Littlefield, Adams, 1968
Buku Teks
Mott, George Fox
Barnes & Noble, 1957
Buku Teks SO
Hamblen, David L.
Churchill Livingstone, Elsevier, 2007
Buku Teks SO
Bronson, Richard
McGraw-Hill, 1997
Buku Teks SO
Gultom, Samuel
Greenwood Press, 1987
Buku Referensi