APA (7th ed.) Citation

McFarland, J. (1990). The Historical Instruments of Armagh Observatory.

Chicago Style (17th ed.) Citation

McFarland, John. The Historical Instruments of Armagh Observatory. 1990.

MLA (9th ed.) Citation

McFarland, John. The Historical Instruments of Armagh Observatory. 1990.

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