Snook, Roger
Update Publ., 1974
Buku Teks
David Cone, editor; Jane H. Brice, editor; Theodore R. Delbridge, editor; J. Brent Myers
John Wiley & Sons, 2015
Buku Teks
Henry Juana, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2008
UI - Tesis (Open)
Aehlert, Barbara
McGraw-Hill Publishing , 2007
Multimedia
Aehlert, Barbara
McGraw-Hill Publishing , 2007
Multimedia