Institution of civil engineers. (1981). Appropriate technology in civil engineering: Proceedings of the conferance held by the institution of civil engineers. Thomas telford Ltd.
استشهاد بنمط شيكاغوInstitution of civil engineers. Appropriate Technology in Civil Engineering: Proceedings of the Conferance Held by the Institution of Civil Engineers. London: Thomas telford Ltd, 1981.
MLA استشهادInstitution of civil engineers. Appropriate Technology in Civil Engineering: Proceedings of the Conferance Held by the Institution of Civil Engineers. Thomas telford Ltd, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.