Ward, A.C.
Longman, 1955
Buku Teks
edited by Robert DeMaria, Jr.
Blackwell, 1996
Buku Teks
Richetti, John
John Wiley & Sons, 2017
Buku Teks
Willi, Walter
Benno Schwabe & Co, 1948
Buku Teks
Stephen, Leslie, 1832-1904
University Paperbacks, 1963
Buku Teks