Cita APA (7th ed.)

Keith, L. H. (1988). Principles of environmental sampling. American Chemical Society.

Cita Chicago (17th ed.)

Keith, Lawrence H. Principles of Environmental Sampling. Washington, D.C: American Chemical Society, 1988.

Cita MLA (9th ed.)

Keith, Lawrence H. Principles of Environmental Sampling. American Chemical Society, 1988.