Pilling, David
Tim Duggan Books,, 2018
Buku Teks SO
Love, Alaina
McGraw-Hill, 2009
Buku Teks
Krishnan, Krish
Morgan Kaufmann, 2015
eBooks
Maxwell, John C.
Menuju Insan Cemerlang (MIC), 2015
Buku Teks SO
Becerra-Fernandez, Irma
Routledge, 2015
Buku Teks SO