APA (7th ed.) Citation

Walkington, T. (1639). The optick glasse of humors.

Chicago Style (17th ed.) Citation

Walkington, Thomas. The Optick Glasse of Humors. London, 1639.

MLA (9th ed.) Citation

Walkington, Thomas. The Optick Glasse of Humors. 1639.

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