Springer Cham, 2019
eBooks
Mitchell, William J.
MIT Press, 1998
Buku Teks SO
Rashid, Karim, editor
Abbeville Press, 2003
Buku Referensi
Sternberg, Robert J.
Wadsworth and Cengage Learning, 2012
Buku Teks SO
Ashcraft, Mark H.
Pearson, 2014
Buku Teks SO