Berg, Bruce L. (Bruce Lawrence), 1954-, author
Allyn and Bacon, 1992
Buku Teks
compiled and edited by Harold Shepherd and Byron D. Sher
Foundation Press, 1960
Buku Teks
Sullivan, John L., author
McGraw-Hill, 1977
Buku Teks
Walker, Samuel, author
McGraw-Hill, 1992
Buku Teks
Sawer, Geoffrey, 1910-1996, author
Clarendon Press, 1965
Buku Teks