http://cikguromie.net
http://mhfnambayan.wordpress.com/koleksi-soalan/
http://www.slideshare.net/muhammadhedhir/unit-8-lukisan-isometrik
http://www.slideshare.net/muhammadhedhir/nota-lukisan-kejuruteraan
http://lkejuruteraan.blogspot.com/p/lukisan-ortografik.html