{"source":"book","style":"apa","contributors": [{"function":"author","last":"John","first":"of","middle":"St Thomas,"},{"function":"author","last":"Deely","first":"John","middle":"N"},{"function":"author","last":"Powell","first":"Ralph","middle":"Austin"} ],"pubtype": {"main": "pubnonperiodical"},"pubnonperiodical": {"title":"Tractatus de signis : the semiotic of John Poinsot","publisher":"University of California Press","city":"Berkeley","year":"1985"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"8763839","isbn":"0520042522 9780520042520"}