{"source":"book","style":"apa","contributors": [{"function":"author","last":"Clark","first":"Kenneth"},{"function":"author","last":"Leonardo"},{"function":"author","last":"Kemp","first":"Martin"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Leonardo da Vinci","publisher":"Viking","city":"Harmondsworth, Middlesex, England; New York","year":"1988"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"20706675","isbn":"0670809101 9780670809103"}