APA (7th ed.) Citation

Locke, J. (1851). Observations on terrestrial magnetism. [publisher not identified].

Chicago Style (17th ed.) Citation

Locke, John. Observations on Terrestrial Magnetism. Washington, D.C.: [publisher not identified], 1851.

MLA (9th ed.) Citation

Locke, John. Observations on Terrestrial Magnetism. [publisher not identified], 1851.

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