Lee W. Graber, Robert L. Vanarsdall, Katherine W.L., editor
Elsevier Mosby, 2012
Buku Teks SO
Doyle, Julia
Clanrye International, 2019
Buku Teks SO
Parkes, P.A
Croom Helm , 1986
Buku Teks SO
Ludwig, Björn
Thieme, 2012
Buku Teks SO
Philadelphia : Current History Inc.
Majalah, Jurnal, Buletin