Dyfyniad APA

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

Dyfyniad Arddull 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.

Dyfyniad MLA

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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