APA (7th ed.) Citation

Ordnance Survey letters relating to Co. Louth, by John O'Donovan, Patrick O'Keeffe and Thomas O'Connor, 1835 - 6.

Chicago Style (17th ed.) Citation

Ordnance Survey Letters Relating to Co. Louth, by John O'Donovan, Patrick O'Keeffe and Thomas O'Connor, 1835 - 6.

MLA (9th ed.) Citation

Ordnance Survey Letters Relating to Co. Louth, by John O'Donovan, Patrick O'Keeffe and Thomas O'Connor, 1835 - 6.

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