by Paul A. Freund [and others]
Little, Brown, 1966
Buku Teks
by Paul A. Freund [and others]
Little, Brown, 1954
Buku Teks
edited by George W. Keeton and Georg Schwarzenberger
Stevens and Sons, 1948
Buku Teks
Gaa, Charles J.
McGraw-Hill , 1965
Buku Referensi
edited Kenneth F. Wallis
An Elgar Collection , 1994
Buku Teks