APA (7th ed.) Citation

Widgery, A. G. (1954). What is religion? (1. publ. in Great Britain.). Allen & Unwin.

Chicago Style (17th ed.) Citation

Widgery, Alban G. What Is Religion? 1. publ. in Great Britain. London: Allen & Unwin, 1954.

MLA (9th ed.) Citation

Widgery, Alban G. What Is Religion? 1. publ. in Great Britain. Allen & Unwin, 1954.

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