APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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