テキスト

Wolfram Research (2015), OptionalElement, Wolfram言語関数， https://reference.wolfram.com/language/ref/OptionalElement.html.

CMS

Wolfram Language. 2015. "OptionalElement." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/OptionalElement.html.

APA

Wolfram Language. (2015). OptionalElement. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/OptionalElement.html

BibTeX

@misc{reference.wolfram_2025_optionalelement, author="Wolfram Research", title="{OptionalElement}", year="2015", howpublished="\url{https://reference.wolfram.com/language/ref/OptionalElement.html}", note=[Accessed: 05-October-2025]}

BibLaTeX

@online{reference.wolfram_2025_optionalelement, organization={Wolfram Research}, title={OptionalElement}, year={2015}, url={https://reference.wolfram.com/language/ref/OptionalElement.html}, note=[Accessed: 05-October-2025]}