APA (7th ed.) Citation

ProQuest (Firm). (1868). [Extension of patent to John Young.]. [publisher not identified].

Chicago Style (17th ed.) Citation

ProQuest (Firm). [Extension of Patent to John Young.]. Washington: [publisher not identified], 1868.

MLA (9th ed.) Citation

ProQuest (Firm). [Extension of Patent to John Young.]. [publisher not identified], 1868.

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