Cita APA (7th ed.)

Brown, J. R. (1998). Recommended chemical soil test procedures: For the North Central Region (Rev. ed.). Missouri Agricultural Experiment Station.

Cita Chicago (17th ed.)

Brown, J. R. Recommended Chemical Soil Test Procedures: For the North Central Region. Rev. ed. Columbia, MO: Missouri Agricultural Experiment Station, 1998.

Cita MLA (9th ed.)

Brown, J. R. Recommended Chemical Soil Test Procedures: For the North Central Region. Rev. ed. Missouri Agricultural Experiment Station, 1998.