Pennsylvania. Bureau of Plant Industry, Wheeler, A. G., & Nixon, H. F. (1979). Insect survey and detection in State Departments of Agriculture. Penna. Dept. of Agriculture, Bureau of Plant Industry.
Chicago Style (17th ed.) CitationPennsylvania. Bureau of Plant Industry, A. G. Wheeler, and Henry F. Nixon. Insect Survey and Detection in State Departments of Agriculture. Harrisburg: Penna. Dept. of Agriculture, Bureau of Plant Industry, 1979.
MLA (9th ed.) CitationPennsylvania. Bureau of Plant Industry, et al. Insect Survey and Detection in State Departments of Agriculture. Penna. Dept. of Agriculture, Bureau of Plant Industry, 1979.
Warning: These citations may not always be 100% accurate.