New York : Macmillan, 1993,
Buku Referensi
[Fakultas Kedokteran Universitas Indonesia, Universiti Kebangsaan Malaysia. Department of Community Health], 2007
Artikel Jurnal
Hahn, Dale B., author
McGraw-Hill, 2002
Buku Teks
Gandhi, M.K., 1869-1948, author
Navajivan, 1948
Buku Teks
Donatelle, Rebecca J., author
Pearson, 2014
Buku Teks