Lavine, A. Lincoln
Prentice-Hall, 1963
Buku Teks
by Thomas W. Dunfee [and others]
McGraw-Hill, 1996
Buku Teks
Lavine, Abraham Lincoln
Prentice-Hall, 1963
Buku Teks
Alexander Hamilton Institute
Alexander Hamilton Institute, 1971
Buku Referensi
Twomey
South-Western Co, 1987
Buku Teks