Hegeland, Hugo, author
Elanders Boktryckeri Aktiebolag, 1951
Buku Teks
Ellis, Howard S., author
Harvard University Press , 1937
Buku Teks
Newlyn, W.T., author
Oxford University Press, 1962
Buku Teks
Niehans, Jurg, author
John Hopkins University Press, 1980
Buku Teks
Rogers, A.J., author
Dryden Press, 1972
Buku Teks