Free Speech Yearbook. National Communication Association.
芝加哥风格引文Free Speech Yearbook. National Communication Association.
MLA引文Free Speech Yearbook. National Communication Association.
警告：这些引文格式不一定是100％准确.
APA引文
Free Speech Yearbook. National Communication Association.
芝加哥风格引文Free Speech Yearbook. National Communication Association.
MLA引文Free Speech Yearbook. National Communication Association.