Sauvy, Alfred
Basic Books, 1969
Buku Teks
Davison, Frank Dalby, 1983-1970, author
Angus and Robertson, 1973
Buku Teks
edited by Penny Kaganoff and Susan Spano
Harcourt Brace & Company, 1997
Buku Teks
Bendixen, Alfred, author
Wiley-Blackwell, 2010
Buku Teks
Allen, Lee, author
Hill And Wang, 1962
Buku Teks