APA (7th ed.) Citation

Spiegel, C. A. (2023). 4D printing of programmable polymers.

Chicago Style (17th ed.) Citation

Spiegel, Christoph A. 4D Printing of Programmable Polymers. Heidelberg, 2023.

MLA (9th ed.) Citation

Spiegel, Christoph A. 4D Printing of Programmable Polymers. 2023.

Warning: These citations may not always be 100% accurate.