APA
The Illustrated Science and Invention Encyclopedia, . (1977). Vol. 6 (Cultivator-Dynamometer ). New York: H.S Stuttman Co.INC.
Chicago
The Illustrated Science and Invention Encyclopedia, . 1977. Vol. 6 (Cultivator-Dynamometer ). New York: H.S Stuttman Co.INC.
Harvard
The Illustrated Science and Invention Encyclopedia, . (1977). Vol. 6 (Cultivator-Dynamometer ). New York: H.S Stuttman Co.INC.
MLA
The Illustrated Science and Invention Encyclopedia, . Vol. 6 (Cultivator-Dynamometer ). New York: H.S Stuttman Co.INC. 1977.