APA (7th ed.) Citation

Henry, M. (2021). In fact: An optimist's guide to Ireland at 100. Gill Books.

Chicago Style (17th ed.) Citation

Henry, Mark. In Fact: An Optimist's Guide to Ireland at 100. Dublin: Gill Books, 2021.

MLA (9th ed.) Citation

Henry, Mark. In Fact: An Optimist's Guide to Ireland at 100. Gill Books, 2021.