Zipf, George Kingsley
Human behavior and the principle of least effort : an introduction to human ecology / George Kingsley Zipf
Hafner Publishing Company, 1965
 Buku Teks
Hawley, Amos H., author
Human ecology : a theoretical essay
The University of Chicago Press, 1986
 Buku Teks
Hawley, Amos H., author
Human ecology : a theory of community structure
The Ronald Press, 1950
 Buku Teks
Ekonesia : a journal of Indonesia human ecology
Program Pascasarjana Universitas Indonesia, 1994
 Majalah, Jurnal, Buletin
Watson, Richard A., author
Man and nature: an anthropological essay in human ecology
Harcourt, Brace and World, 1969
 Buku Teks