テキスト

Wolfram Research (2014), CountsBy, Wolfram言語関数， https://reference.wolfram.com/language/ref/CountsBy.html.

CMS

Wolfram Language. 2014. "CountsBy." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/CountsBy.html.

APA

Wolfram Language. (2014). CountsBy. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/CountsBy.html

BibTeX

@misc{reference.wolfram_2025_countsby, author="Wolfram Research", title="{CountsBy}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/CountsBy.html}", note=[Accessed: 13-April-2026]}

BibLaTeX

@online{reference.wolfram_2025_countsby, organization={Wolfram Research}, title={CountsBy}, year={2014}, url={https://reference.wolfram.com/language/ref/CountsBy.html}, note=[Accessed: 13-April-2026]}