Blalock, Hubert M., author
Prentice-Hall, 1969
Buku Teks
Oliver, Michael, 1945
Macmillan Press, 1996
Buku Teks
Ledin, Per, author
Sage, 2018
Buku Teks
Schumaker, Paul, author
Blackwell Publishing, 2008
Buku Teks
Abalos, Inaki, author
MIT Press, 2003
Buku Teks