APA
Mitchell J. W., Livingston G. A. & Mitchell J. W. (1968). Methods of studying plant hormones and growth-regulating substances. [Washington]: U.S. Agricultural Research Service; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Chicago
Mitchell John W, Livingston George A and Mitchell John W. 1968. Methods of studying plant hormones and growth-regulating substances. [Washington]: U.S. Agricultural Research Service; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
Harvard
Mitchell J. W., Livingston G. A. and Mitchell J. W. (1968). Methods of studying plant hormones and growth-regulating substances. [Washington]: U.S. Agricultural Research Service; for sale by the Supt. of Docs., U.S. Govt. Print. Off.
MLA
Mitchell John W, Livingston George A and Mitchell John W. Methods of studying plant hormones and growth-regulating substances. [Washington]: U.S. Agricultural Research Service; for sale by the Supt. of Docs., U.S. Govt. Print. Off. 1968.