APA (7th ed.) Citation

Gilreath, C. L. (1979). AGRICOLA user's guide. Dept. of Agriculture, Science and Education Administration.

Chicago Style (17th ed.) Citation

Gilreath, Charles L. AGRICOLA User's Guide. Beltsville, Md.: Dept. of Agriculture, Science and Education Administration, 1979.

MLA (9th ed.) Citation

Gilreath, Charles L. AGRICOLA User's Guide. Dept. of Agriculture, Science and Education Administration, 1979.