Roehl, L. M. (1916). Agricultural woodworking: A group of problems for rural and graded schools, agricultural high schools and the farm workshop. The Bruce Pub. Co.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Roehl, Louis M. Agricultural Woodworking: A Group of Problems for Rural and Graded Schools, Agricultural High Schools and the Farm Workshop. Milwaukee, Wis.: The Bruce Pub. Co, 1916.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Roehl, Louis M. Agricultural Woodworking: A Group of Problems for Rural and Graded Schools, Agricultural High Schools and the Farm Workshop. The Bruce Pub. Co, 1916.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.