Woll, Peter
Little, Brown, 1984
Buku Teks
Woll, Peter
Little, Brown, 1965
Buku Teks
Hall, Kermit L.
Oxford University Press, 1991
Buku Teks
Presser, Stephen B.
St.Paul, Minn., 1980
Buku Teks
by William B. Lockhart ... [and others]
West Publishing Company, 1975
Buku Teks