Artikel Jurnal
American Library Association, 2018
Majalah, Jurnal, Buletin
Lovelock, Christopher H., author
Pearson Prentice Hall, 2001
Buku Teks
Lovelock, Christopher H., author
Prentice-Hall, 2000
Buku Teks
Lovelock, Christopher H., author
Prentice-Hall, 1960
Buku Teks