compiled by Ruth Z. Temple; edited by Martin Tucker
Frederick Ungar Publishing, 1981
Buku Referensi
Compiled and edited by Dorothy Nyren Curley, Maurice Kramer, Elaine Fialka Kramer
Continuum, 1989
Buku Referensi
edited by Charles Wells Moulton
Gloucester, 1959
Buku Referensi
Bennett, A
J.M. Dent & sons, 1954
Koleksi Publik
Blackwood, Brian D.
Koward W. Soms, 1982
Buku Teks SO