文本

Wolfram Research (1996)，Before，Wolfram 语言函数，https://reference.wolfram.com/language/ref/Before.html.

CMS

Wolfram 语言. 1996. "Before." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/Before.html.

APA

Wolfram 语言. (1996). Before. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/Before.html 年

BibTeX

@misc{reference.wolfram_2025_before, author="Wolfram Research", title="{Before}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/Before.html}", note=[Accessed: 01-May-2026]}

BibLaTeX

@online{reference.wolfram_2025_before, organization={Wolfram Research}, title={Before}, year={1996}, url={https://reference.wolfram.com/language/ref/Before.html}, note=[Accessed: 01-May-2026]}