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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRoehl, 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRoehl, 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.
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