edited by Howard Nemerov
Voice of America Forum Lectures, 1973
Buku Teks SO
edited by Stuart Friebert
Longman, 1989
Buku Teks SO
Stepanchev, Stephen
Harper and Row, 1965
Buku Teks SO
edited by Philip Dacey
HarperCollins, 1986
Buku Teks SO
Corcoran, Neil
Longman, 1993
Buku Teks SO