APA Citation

Smith, R. A., Alexander, R. B., & Schwarz, G. E. Natural background concentrations of nutrients in streams and rivers of the conterminous United States.

Trích dẫn kiểu Chicago

Smith, Richard A., Richard B. Alexander, và Gregory E. Schwarz. Natural Background Concentrations of Nutrients in Streams and Rivers of the Conterminous United States.

MLA Citation

Smith, Richard A., Richard B. Alexander, và Gregory E. Schwarz. Natural Background Concentrations of Nutrients in Streams and Rivers of the Conterminous United States.

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