Rabbit, Lamb, Goat, and Pork: The Comprehensive Photographic Guide to Humane Slaughtering and Butchering. Storey Publishing. 2014-03-11: 93 [2023-12-08]
January 1999 德累斯顿工业大学,榮譽博士學位,27 April 1999 霍华德大学,Honorary Doctorate of humane letters,8 May 1999 布拉迪斯拉發夸美紐斯大學,doctor honoris causa,15 Jun 1999 聖母大學,Doctor
doi:10.1111/j.1600-0897.2011.01003.x. Levy, JK. Contraceptive vaccines for the humane control of community cat populations.. American journal of reproductive
Maryland MATRIX: CenterforHumane Arts, Letters, and Social Sciences Online [1] (页面存档备份,存于互联网档案馆) at Michigan State University Centerfor Digital Research