Miller, Roger LeRoy, author
McGrow-Hill, 1985
Buku Teks
Simpson, Thomas D., author
Prentice-Hall, 1987
Buku Teks
Whittlesey, Charles R., author
Macmillan, 1969
Buku Teks
Whittlesey, Charles R., author
Macmillan, 1954
Buku Teks
Whittlesey, Charles R., author
Macmillan, 1967
Buku Teks