Hofstadler, Richard, author
Prentice-Hall, 1895
Buku Teks
Bailey, Thomas Andrew, 1902-1983, author
D.C. Healt, 1987
Buku Teks
Morison, Samuel Eliot, author
Oxford University Press, 1949
Buku Teks
Alden, John Richard, author
Harper & Row Publishers, 1963
Buku Teks
Bailey, Thomas Andrew, 1902-1983, author
D.C. Health, 1983
Buku Teks