Johnson, A., & King, W. H. (1946). A manual of specifications and quantities for civil engineers: A textbook for students in civil and municipal engineering. English Universities Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Johnson, A., و William Herbert King. A Manual of Specifications and Quantities for Civil Engineers: A Textbook for Students in Civil and Municipal Engineering. London: English Universities Press, 1946.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Johnson, A., و William Herbert King. A Manual of Specifications and Quantities for Civil Engineers: A Textbook for Students in Civil and Municipal Engineering. English Universities Press, 1946.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.