SINGH Y K. (2017). ENVIRONMENTAL SCIENCE. NEW AGE INTERNATIONAL PUBLISHERS.
Cita Chicago (17th ed.)SINGH Y K. ENVIRONMENTAL SCIENCE. NEW AGE INTERNATIONAL PUBLISHERS, 2017.
Cita MLA (9th ed.)SINGH Y K. ENVIRONMENTAL SCIENCE. NEW AGE INTERNATIONAL PUBLISHERS, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.