edited by Richard B. Goldbloom
Churchill Livingstone, 1997
Buku Teks
Glenn, H. Stephen
Prima Publishing, 1989
Buku Teks
Knapp, Caprice, author
[, Springer], 2012
eBooks
Berg, Joel H., author
Wiley Blackwell, 2009
Buku Teks
Jelliffe, Derrick B., author
Office of War on Hunger Agency for International Development , 1969
Buku Teks