APA (7th ed.) Citation

Provin, T. L. (1999). Testing your soil: How to collect and send samples (Revision.). Texas Agricultural Extension Service, Texas A&M University System.

Chicago Style (17th ed.) Citation

Provin, Tony Lee. Testing Your Soil: How to Collect and Send Samples. Revision. [College Station, Tex.]: Texas Agricultural Extension Service, Texas A&M University System, 1999.

MLA (9th ed.) Citation

Provin, Tony Lee. Testing Your Soil: How to Collect and Send Samples. Revision. Texas Agricultural Extension Service, Texas A&M University System, 1999.