ebrary, Inc. (2012). Structure, group definitions and correspondence tables. International Labour Office.
芝加哥风格引文ebrary, Inc. Structure, Group Definitions and Correspondence Tables. Geneva: International Labour Office, 2012.
MLA引文ebrary, Inc. Structure, Group Definitions and Correspondence Tables. International Labour Office, 2012.
警告：这些引文格式不一定是100％准确.