editor, D.H. Borchardt, associate editor, Victor Crittenden
Fairfax, Syme & Weldon Associates, 1987
Buku Referensi
edited by Stephen Goddard
Barnes & Noble Books , 1983
Buku Referensi
Blazek, Ron
Libraries Unlimited, 2000
Buku Referensi
Antony, Arthur
John Wiley & Sons, 1979
Buku Teks SO
Keaveney, Sydney Starr
Gale Research Co., 1974
Buku Teks SO