United States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Laboratories approved to receive soil. The Service.
Chicago Style (17th ed.) CitationUnited States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Laboratories Approved to Receive Soil. Hyattsville, Md.: The Service.
MLA (9th ed.) CitationUnited States. Animal and Plant Health Inspection Service. Plant Protection and Quarantine Programs. Laboratories Approved to Receive Soil. The Service.
Warning: These citations may not always be 100% accurate.