R. R. Bowker Company, 1982
Buku Referensi
edited by Ronald Baughman
Gale Reserach , 1986
Buku Referensi
R. R. Bowker Company, 1982
Buku Referensi
Prentice-Hall, 2000
Buku Teks SO
edited by Stanley J. Kunitz, Howard Haycraft
Wilson, 1936
Buku Referensi