Roberts, Stephen H.
Melbourne University Press, 1964
Buku Teks SO
Samers, Michael
Routledge, 2017
Buku Teks SO
Vasudevan, Alexander
Wiley Blackwell, 2015
Buku Teks SO
Harper, Laurel
Chronicle Books, 1999
Buku Referensi
edited by James A. Inciardi
Sage, 1980
Buku Teks