Warner, W. Lloyd, author
Yale University Press, 1941
Buku Teks
Herzberg, Caspar, author
Roundtree Press, 2017
Buku Teks
Ferriss, Hugh, author
Dover Publications, 2005
Buku Teks
The University of Michigan, 1975
Buku Teks
Tonkiss, Fran, author
Polity Press, 2013
Buku Teks