Koestler, A., Hardy, D., & Viereck, P. (1961). Darkness at noon: By Arthur Koestler. Transl. by Daphne Hardy. With a Foreword by Peter Viereck (13. print.). The New American Library.
Citação do estilo Chicago (17ª ed.)Koestler, Arthur, Daphne Hardy, e Peter Viereck. Darkness at Noon: By Arthur Koestler. Transl. by Daphne Hardy. With a Foreword by Peter Viereck. 13. print. New York: The New American Library, 1961.
Citação MLA (8ª ed.)Koestler, Arthur, et al. Darkness at Noon: By Arthur Koestler. Transl. by Daphne Hardy. With a Foreword by Peter Viereck. 13. print. The New American Library, 1961.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.