Não informado. (1940). Engineers digest: Review of engineering progress. Engineer's Digest Publications.
Citação do estilo Chicago (17ª ed.)Não informado. Engineers Digest: Review of Engineering Progress. London: Engineer's Digest Publications, 1940.
Citação MLA (8ª ed.)Não informado. Engineers Digest: Review of Engineering Progress. Engineer's Digest Publications, 1940.
警告：这些引文格式不一定是100％准确.