Busch, Daryle H., author
Allyn and Bacon , 1978
Buku Teks
Busch, Daryle H., author
Allyn and Bacon, 1973
Buku Teks
by Robert W. Parry ... [and others]
Prentice-Hall, 1970
Buku Teks
Compton, Charles, author
McGarw-Hill, 1979
Buku Teks
Garland, John K., author
Macmillan, 1975
Buku Teks