APA-referens (7:e uppl.)

(1942). I believe: The personal philosophies of twenty-three eminent men and women of our time. Allen & Unwin.

Chicago-referens (17:e uppl.)

I Believe: The Personal Philosophies of Twenty-three Eminent Men and Women of Our Time. London: Allen & Unwin, 1942.

MLA-referens (8:e uppl.)

I Believe: The Personal Philosophies of Twenty-three Eminent Men and Women of Our Time. Allen & Unwin, 1942.