文本

Wolfram Research (1991)，$Failed，Wolfram 语言函数，https://reference.wolfram.com/language/ref/$Failed.html.

CMS

Wolfram 语言. 1991. "$Failed." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/$Failed.html.

APA

Wolfram 语言. (1991). $Failed. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/$Failed.html 年

BibTeX

@misc{reference.wolfram_2025_$failed, author="Wolfram Research", title="{$Failed}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/$Failed.html}", note=[Accessed: 01-May-2026]}

BibLaTeX

@online{reference.wolfram_2025_$failed, organization={Wolfram Research}, title={$Failed}, year={1991}, url={https://reference.wolfram.com/language/ref/$Failed.html}, note=[Accessed: 01-May-2026]}