Bert van Oers
Springer, 2012
eBooks
edited by Robert M. Hashway
Praeger, 1990
Buku Referensi
Rankin, Sally H., author
Lippincott , 2001
Buku Teks
edited by Betty P. Mathews
Third Party Publishing, 1982
Buku Teks
Babcock, Dorothy E.
Mosby , 1994
Buku Teks