Miklos Kengyel
Springer, 2012
eBooks
Christensen, Kit R., author
McGraw-Hill, 2002
Buku Teks
edited by Mary Cherian and Rosalind Y. Mau
McGrow-Hill, , 2003
Buku Teks
Planet, Lonely, author
Lonely Planet, 2012
Buku Teks
Harvey, Clare G., author
Thorsons, 1995
Buku Referensi