Comstock, H. B. (1993). The iron horse: An illustrated history of steam locomotives. [Sykesville? Md.]: Greenberg Pub. Co..
استشهاد بنمط شيكاغوComstock, Henry B. The Iron Horse: An Illustrated History of Steam Locomotives. [Sykesville? Md.]: Greenberg Pub. Co., 1993.
MLA استشهادComstock, Henry B. The Iron Horse: An Illustrated History of Steam Locomotives. [Sykesville? Md.]: Greenberg Pub. Co., 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.