Götze, Heinz
Castel del Monte : geometric marvel of the Middle Ages
Prestel, 1998
 Buku Teks SO
Sakamoto, Taro
Japanese Emperor through history / Taro, Sakamoto
The International Society for Educational Information, 1984.
 Buku Teks SO
Symons, Julian
Charles Dickens
Arthur Barker, 1951
 Buku Teks SO
Fielding, K.J.
Charles Dickens
Longman, Green, 1953
 Buku Teks SO
Roberts, Don D.
The existential graphs of Charles S. Peirce
Mouton, 1973
 Buku Teks SO