Barnet, Sylvan
Bedford/St Martin's, 2014
Buku Teks SO
Barnet, Sylvan
Bedford/St. Martin's, 2002
Buku Teks SO
edited by David Rubel
H. Holt, 1998
Buku Teks SO
Marley, Charles
Emerald Publishing Limited, 2020
eBooks
Scharbach, Alexander
McGraw-Hill , 1965
Buku Teks SO