Trasar-Cepeda, Carmen, editor
Springer, 2012
eBooks
Prentice-Hall, 1984
Buku Teks
edited by John E. Hay
United Nations Environment Programme, 1995
Buku Teks
edited by John E. Hay, Wimala Ponniah and Mahesh Pradhan
United Nations Environment Programme , 1995
Buku Teks
Green, Roger H., author
John Wiley & Sons, 1979
Buku Teks