http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Vẽ và thiết kế mạch in với Orcad 9.0
Phạm Quang Huy và Nguyễn Đức Hiệp
electronic circuit design,orcad ( computer program language )