APA (7th ed.) Citation

Mark, G. An index of places mentioned in Mr. Horsley's map of Northumberland.

Chicago Style (17th ed.) Citation

Mark, George. An Index of Places Mentioned in Mr. Horsley's Map of Northumberland.

MLA (9th ed.) Citation

Mark, George. An Index of Places Mentioned in Mr. Horsley's Map of Northumberland.

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