Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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