Greeg, Davis W.
Richard D. Irwin, Inc., 1960
Buku Teks
Nancy LoPatin-Lummis, editor
Wiley-Blackwell, 2008
Buku Teks
Warner, W. Lloyd, author
Yale University Press, 1955
Buku Teks
Warner, W. Lloyd, author
Yale University Press, 1941
Buku Teks
Richard O. Davies
Wiley Blackwell, 2017
Buku Teks