APA引文

(1999). The employment situation in April 1999 (final results). NSO Special Release.

芝加哥风格引文

"The Employment Situation in April 1999 (final Results)." NSO Special Release 1999.

MLA引文

"The Employment Situation in April 1999 (final Results)." NSO Special Release, 1999.

警告：这些引文格式不一定是100％准确.