{"source":"book","style":"apa","contributors": [{"function":"author","last":"Newton","first":"Isaac"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Philosophia naturalis principia mathematica","publisher":"Wm. Dawson","city":"London","year":"1953"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"4351188"}