Geddes, S. (1951). Building and civil engineering plant: Its purchase, application and operation. C. Lockwood.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Geddes, Spence. Building and Civil Engineering Plant: Its Purchase, Application and Operation. London: C. Lockwood, 1951.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Geddes, Spence. Building and Civil Engineering Plant: Its Purchase, Application and Operation. C. Lockwood, 1951.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.