Bushong, Stewart Carlyle
Elsevier Mosby, 2013
Buku Teks SO
Jamie V. Trapp, Tomas Kron, editor
Taylor & Francis Group, 2008
Buku Teks
Prince, Robert
Springer, 2012
eBooks
World Health Organization Regional Office for Europe, 1989
Buku Teks
Thomson, John F.
Reinhold Publ., 1962
Buku Teks SO