Stanley, Timothy W., author
Westview Press, 1982
Buku Teks
Ahmad Ashov Birry, author
Sekolah Ilmu Lingkungan Universitas Indonesia, 2020
UI - Tesis (Membership)
Glendon, Mary Ann
St.Paul,Min., 1982
Buku Teks
Ehrmann, Henry W., author
Prentice-Hall, 1976
Buku Teks
Moran, Terence, author
E&FN Spon, 1997
Buku Teks