APA
(1977). Cultivator-Dynamometer. New York: H.S. Stuttman Co., Inc.
Chicago
1977. Cultivator-Dynamometer. New York: H.S. Stuttman Co., Inc.
Harvard
(1977). Cultivator-Dynamometer. New York: H.S. Stuttman Co., Inc.
MLA
Cultivator-Dynamometer. New York: H.S. Stuttman Co., Inc. 1977.
