Παραπομπή APA

Sayers, D. L. (1972). Clouds of witness. Victor Gollancz.

Παραπομπή Chicago Style

Sayers, Dorothy L. Clouds of Witness. London: Victor Gollancz, 1972.

Παραπομπή MLA

Sayers, Dorothy L. Clouds of Witness. Victor Gollancz, 1972.