edited by S.H. Steinberg
Funk & Wagnalls, 1954
Buku Referensi
Blair, Walter, author
Scott-Foresman, 1946-1947
Buku Teks
Vikas Publishing House, 1990
Buku Teks
Funk & Wagnalls, 2000,
Buku Referensi
edited by Martin Tucker
Continuum, 1989
Buku Referensi