Ehrlich, Paul R., author
Sierra Club/ballantine, 1971
Buku Teks
D.C U.S.Bureau of the Census , 1980
Buku Teks
edited by Ronald L. Meek and Steve Weissman
Ramparts Press , 1971
Buku Teks
New American Library, 1973
Buku Teks
Nicky Maninda, author
2014
UI - Skripsi (Membership)