Pole, Andy, author
Chapman & Hall, 1994
Buku Teks
Bloomfield, Peter, author
John Wiley & Sons, 1976
Buku Teks
Becketti, Sean, author
Stata Press, 2013
Buku Teks
Hudson, William J., author
John Wiley & Sons, 1993
Buku Teks
Maisal, Sherman J., author
John Wiley & Sons, 1957
Buku Teks