एपीए उद्धरण

Lofts, S., Spurgeon, D. J., Svendsen, C., & Tipping, E. Deriving soil critical limits for Cu, Zn, Cd, Pb: A method based on free ion concentrations.

शिकागो स्टाइल उद्धरण

Lofts, Stephen., David J. Spurgeon, Claus Svendsen, और Edward Tipping. Deriving Soil Critical Limits for Cu, Zn, Cd, Pb: A Method Based On Free Ion Concentrations.

एमएलए उद्धरण

Lofts, Stephen., David J. Spurgeon, Claus Svendsen, और Edward Tipping. Deriving Soil Critical Limits for Cu, Zn, Cd, Pb: A Method Based On Free Ion Concentrations.