Foster, Illysa R.
Jones & Bartlett Learning, 2011
Buku Teks
Yelland, Sharon
Elsevier , 2005
Buku Teks
Varney, Helen
Blackwell Scientific Publications, 1987
Buku Teks
edited by Maureen D. Raynor, Jayne E. Marshall and Amanda Sullivan
Elsevier, 2005
Buku Teks
Bryar, Rosamund M.
Palgrave, 1995
Buku Teks