APA (7th ed.) Citation

O'Brian, P. (1981). The Ionian mission. Harper Collins Publishers.

Chicago Style (17th ed.) Citation

O'Brian, Patrick. The Ionian Mission. London: Harper Collins Publishers, 1981.

MLA (9th ed.) Citation

O'Brian, Patrick. The Ionian Mission. Harper Collins Publishers, 1981.

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