Suggs, Robert C.
America : The New Library American Library, 1960.
Buku Teks
Rumbi Mulia
Departemen Pendidikan dan Kebudayaan, 1977
Buku Teks
Burns, Edward McNall, 1897-1972
W.W Norton, 1980
Buku Teks
Lee, Storrs W., author
Holt, Rinehart, 1966
Buku Teks
Kefala, Antigone, author
Hale & Iremonger, 1984
Buku Teks