APA (7th ed.) Citation

Ahmad, I., Hayat, S., & Pichtel, J. (2005). Heavy metal contamination of soil: Problems and remedies. Science Publishers.

Chicago Style (17th ed.) Citation

Ahmad, Iqbal, S. Hayat, and John Pichtel. Heavy Metal Contamination of Soil: Problems and Remedies. Enfield (USA) ; Plymouth, UK: Science Publishers, 2005.

MLA (9th ed.) Citation

Ahmad, Iqbal, et al. Heavy Metal Contamination of Soil: Problems and Remedies. Science Publishers, 2005.