Cita APA (7th ed.)

Sajwan K. S. Kenneth S., Alva A. K. Ashok K., & Keefer R. F. Robert F. (1999). Biogeochemistry of Trace Elements in Coal and Coal Combustion Byproducts. New York, Kluwer Academic, 1999.

Cita Chicago (17th ed.)

Sajwan K. S. Kenneth S., Alva A. K. Ashok K., i Keefer R. F. Robert F. Biogeochemistry of Trace Elements in Coal and Coal Combustion Byproducts. New York, Kluwer Academic, 1999, 1999.

Cita MLA (9th ed.)

Sajwan K. S. Kenneth S., et al. Biogeochemistry of Trace Elements in Coal and Coal Combustion Byproducts. New York, Kluwer Academic, 1999, 1999.