Gerring, John, author
Cambridge University Press, 2017
Buku Teks
Giddings, J. Calvin, author
John Wiley & Sons, 1991
Buku Teks
edited by Otto Neurath, Rudolf Carnap and Charles Morris
University of Chicago Press, 1955
Buku Referensi
Finster, Felix, editor
[Springer, ], 2012
eBooks
Williams, Malcolm, 1953-, author
Routledge, 2000
Buku Teks