APA (7th ed.) Citation

(1966). Development ad use of patent classification systems. U.S. Department of Commerce.

Chicago Style (17th ed.) Citation

Development Ad Use of Patent Classification Systems. U.S. Department of Commerce, 1966.

MLA (9th ed.) Citation

Development Ad Use of Patent Classification Systems. U.S. Department of Commerce, 1966.

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