James, William, author
Mentor Books, 1958
Buku Teks
Hickey, Raymond, 1954-, author
Wiley Blackwell, 2014
Buku Referensi
Holes, Clive, author
Longman, 1995
Buku Teks
edited by Fritz Stern
Meredian Books, 1959
Buku Teks
edited by Fritz Stern
Merridian Book, 1972
Buku Teks