Keyes, Charles Don
Routledge, 1999
Buku Teks SO
Alexander Moreira-Almeida, Franklin Santana Santos, editors
Springer, 2012
eBooks
Cameron S. Carter, editor
[, Springer], 2012
eBooks
Bear, Mark F.
Wolters Kluwer, 2016
Buku Teks SO
Sturgeon, Scott, 1961-
Routledge, 2000
Buku Teks SO