Symposium on Soil Engineering Mapping la Hermosa Guest Farm Transvaal. (1964). Proceedings of Symposium on Soil Engineering Mapping. South African Institution of Civil Engineers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Symposium on Soil Engineering Mapping la Hermosa Guest Farm Transvaal. Proceedings of Symposium on Soil Engineering Mapping. Johannesburg: South African Institution of Civil Engineers, 1964.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Symposium on Soil Engineering Mapping la Hermosa Guest Farm Transvaal. Proceedings of Symposium on Soil Engineering Mapping. South African Institution of Civil Engineers, 1964.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.