Allen VO, Sutton C.
Bol Col Prof Enferm P R. 1982 Mar;7(29):11-4.
PMID: 6964993

Perlmutter B.
NLN Publ. 1975;(20):41-4.
PMID: 1040809

Tagliareni ME, Pollok CS, Horns PN, LeDane S.
Nurs Health Care Perspect. 1999 Jan-Feb;20(1):15-7.
PMID: 10426093

Millard RM.
NLN Publ. 1974;(14):1-11.
PMID: 4499619

Ashkenas TL.
NLN Publ. 1983;(23):10-4.
PMID: 6557467

Diede N, McNish G, Coose C.
J Nurs Educ. 2000 Oct;39(7):302-7.
PMID: 11052652

Haase PT.
NLN Publ. 1978;(23):i-iii, 1-11.
PMID: 247324