Korner, Christian
Springer, 2012
eBooks
Jacobsen, Dean, author
Oxford University Press, 2017
eBooks
Oxford & IBH Publishing, 1989
Buku Teks
Stiling, Peter, author
McGraw-Hill, 2012
Buku Teks
Brewer, Richard, author
Saunders College Publishing, 1994
Buku Teks