Keene, Donald
Grove Press, 1955
Buku Teks SO
Keene, Donald
J. Murray, 1953
Buku Klasik
The University of Chicago Press, 1952
Buku Teks SO
Westland, Peter
English University, 1950.
Buku Teks SO
Abel, Darrel
Barron's Educational Series, 1963
Buku Referensi