Chen, Kuan I.
Bookman Associates, 1960
Buku Teks
Carr-Saunders, A.M.
Frank Cass, 1964
Buku Teks SO
Keyfitz, Nathan
The University of Chicago Press, 1968
Buku Teks
Population Reference Bureau, Inc., 1972
Buku Teks SO
National Academy of Sciences-National Research Council , 1963
Buku Teks