Rogers, Everett M.
The Free Press, 1971
Buku Teks SO
edited by Caroline B. Brettell and Carolyn F. Sargent
Routledge, 2017
Buku Teks SO
edited by Barbara P. Uzzell, Marcel O. Ponton, Alfredo Ardila
Lawrence Erlbaum Associates, 2007
Buku Teks SO
Singh, N.K.
Springer, 2012
eBooks
Glenda Tibe Bonifacio
Springer, 2012
eBooks