APA-referens (7:e uppl.)

Williamson, C. C. H. (1938). Great Catholics. Nicholson and Watson, Limited.

Chicago-referens (17:e uppl.)

Williamson, Claude C. H. Great Catholics. London: Nicholson and Watson, Limited, 1938.

MLA-referens (8:e uppl.)

Williamson, Claude C. H. Great Catholics. Nicholson and Watson, Limited, 1938.