APA (7th ed.) Citation

Butler, B. P., Forbes, A. B., & Harris, P. M. (1994). Algorithms for geometric tolerance assessment. National Physical Laboratory.

Chicago Style (17th ed.) Citation

Butler, B. P., A. B. Forbes, and P. M. Harris. Algorithms for Geometric Tolerance Assessment. Teddington: National Physical Laboratory, 1994.

MLA (9th ed.) Citation

Butler, B. P., et al. Algorithms for Geometric Tolerance Assessment. National Physical Laboratory, 1994.