APA (7th ed.) Citation

Cox, B. B., & England, A. K. (1987). Patent and trademark office collection of historical and interesting U.S. patents in celebration of our nation's bicentennial: Microfilm index. U.S. Patent Office.

Chicago Style (17th ed.) Citation

Cox, Bruce B., and Amy K. England. Patent and Trademark Office Collection of Historical and Interesting U.S. Patents in Celebration of Our Nation's Bicentennial: Microfilm Index. (Washington, D.C.): U.S. Patent Office, 1987.

MLA (9th ed.) Citation

Cox, Bruce B., and Amy K. England. Patent and Trademark Office Collection of Historical and Interesting U.S. Patents in Celebration of Our Nation's Bicentennial: Microfilm Index. U.S. Patent Office, 1987.