Armstrong, Michael
crest Publishing House, 1999
Buku Teks
Armstrong, Michael
Gramedia, 2003
Buku Teks
Amstrong, Michael
Crest Publishing House, 1999
Buku Referensi
Armstrong, Michael
Bhuana Ilmu Populer, 2003
Buku Teks
Armstrong, Michael
1998
Buku Teks