Mannion, A. M.
Longman Scientific & Technical, 1991
Buku Teks
Hans Gunter Brauch ... [et al.], editors ; with forewords by Achim Steiner ... [et al.] ; with preface essays by Paul C. Crutzen ... [et al.].
Springer, 2011
Buku Teks
Bill Freedman, editor
Springer Reference, 2014
Buku Teks
Artikel Jurnal
Erika Mediana
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2000
UI - Tesis Membership