APA (7th ed.) Citation

Underwriters' Laboratories. (2001). Standard for Class 2 power units (4th ed. July 28, 1994. Revisions through and incl. Oct. 22, 2001.). Underwriters Laboratories.

Chicago Style (17th ed.) Citation

Underwriters' Laboratories. Standard for Class 2 Power Units. 4th ed. July 28, 1994. Revisions through and incl. Oct. 22, 2001. Northbrook, Ill.: Underwriters Laboratories, 2001.

MLA (9th ed.) Citation

Underwriters' Laboratories. Standard for Class 2 Power Units. 4th ed. July 28, 1994. Revisions through and incl. Oct. 22, 2001. Underwriters Laboratories, 2001.