Hitchen JM, Brown RA.
Nurse Educ Today. 1988 Dec;8(6):341-6. doi: 10.1016/0260-6917(88)90075-5.
PMID: 3216850

James D.
Nurs Times. 1972 Feb 24;69(8):Suppl:29-31.
PMID: 5022927

Hinchliff S.
Nurs Stand. 1990 Apr 25-May 1;4(31):33-5. doi: 10.7748/ns.4.31.33.s33.
PMID: 2110311

Kempster RF, Warcaba B.
Nurs Times. 1973 May 03;69(18):Suppl:69-72.
PMID: 4706668

Yoshida K.
Kango Kyoiku. 1979 Oct;20(10):597-603.
PMID: 259728

Schoen DC.
Nurs Res. 1975 Sep-Oct;24(5):383-7.
PMID: 1041623

Dunn NB.
NLN Publ. 1970;(16):19-29.
PMID: 5197567