Underhill, E., & Williams, C. (1991). The letters of Evelyn Underhill (1. publ. in paperback in Great Britain.). Darton, Longman & Todd.
Citazione stile Chigago Style (17a edizione)Underhill, Evelyn, e Charles Williams. The Letters of Evelyn Underhill. 1. publ. in paperback in Great Britain. London: Darton, Longman & Todd, 1991.
Citatione MLA (8a ed.)Underhill, Evelyn, e Charles Williams. The Letters of Evelyn Underhill. 1. publ. in paperback in Great Britain. Darton, Longman & Todd, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.