Forster, Edward Morgan, 1879-1970, author
Vintage Books, 1961
Buku Teks
Verbeke, Geert, author
Springer, 2000
Buku Teks
Rabe-Hesketh, Sophia, author
A Stata Press, 2005
Buku Teks
Rabe-Hesketh, Sophia, author
Stata Press, 2012
Buku Teks
Heck, Ronal H., author
Routledge, 2014
Buku Teks