APA

Keith L. H., . (1993). Principles of environmental sampling. Washington,D.C: American Chemical Society.

Chicago

Keith Lawrence H, . 1993. Principles of environmental sampling. Washington,D.C: American Chemical Society.

Harvard

Keith L. H., . (1993). Principles of environmental sampling. Washington,D.C: American Chemical Society.

MLA

Keith Lawrence H, . Principles of environmental sampling. Washington,D.C: American Chemical Society. 1993.