Key Words. American Society for Indexing.
Chicago Style (17th ed.) CitationKey Words. American Society for Indexing.
MLA引文Key Words. American Society for Indexing.
警告：這些引文格式不一定是100％准確.
APA引文
Key Words. American Society for Indexing.
Chicago Style (17th ed.) CitationKey Words. American Society for Indexing.
MLA引文Key Words. American Society for Indexing.