You can use the appropriate citation option from below to add a reference to this page.
"BTU." Fullformexpand.com, https://www.fullformexpand.com/btu/332892. Accessed 10 Jan. 2026.
Fullformexpand.com, 2026. "BTU." Accessed January 10, 2026. https://www.fullformexpand.com/btu/332892.
"BTU." (n.d.). Fullformexpand.com. Retrieved January 10, 2026, from https://www.fullformexpand.com/btu/332892.
BTU. (2026). Fullformexpand.com. Available at: https://www.fullformexpand.com/btu/332892 (Accessed: 10 January 2026).