Brooker, Graeme, author
Laurence King, 2013
Buku Referensi
Ritchie, Donald A., author
Macmillan, 1985
Buku Teks
Dunbar-Ortiz, Roxanne, 1939-, author
Beacon Press, 2014
Buku Teks
Beard, Charles A., author
Dobleday, 1960
Buku Teks
Nichols, Jeannette P., author
D. Appleton-Century, 1943
Buku Teks