Kurtulus Oztopcu, Zhoumagaly Abuov, Nasir Ka,barov, Youssef Azemoun
Routledge, 1999
Buku Referensi
Routledge, 1998
Buku Teks
edited by Susie Beattie and Rachel Smith
Harper and Collins, 2011
Buku Referensi
HarperCollins, 2011
Buku Referensi
Wichman, Karl, author
Philadelphia, David McKay Company, 1944
Buku Referensi