Sinclair, W. A. (1940). The voice of the Nazi: Being eight broadcast talks given between December 1939 and May 1940. Collins.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sinclair, William Angus. The Voice of the Nazi: Being Eight Broadcast Talks Given Between December 1939 and May 1940. London: Collins, 1940.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sinclair, William Angus. The Voice of the Nazi: Being Eight Broadcast Talks Given Between December 1939 and May 1940. Collins, 1940.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.