Edge, Raymond S.
Ethics of health care : a guide for clinical practice
Cengage Learning, 2018
 Buku Teks
Sokol, Daniel K.
Doing clinical ethics: a hands-on guide for clinicians and others
Springer, 2012
 eBooks
Sherine Kamila Hassan
An Evaluation of psychometric properties: a new measurement scale of grit = Menguji psikometri validitas dan reliabilitas: alat ukur baru untuk grit
2018
 UI - Makalah dan Kertas Kerja
Handbook of multimethod measurement in psychology
edited by Michael Eid and Ed Diener
American Psychological Association, 2006
 Buku Teks
Cattell, Raymond B.
Personality and motivation structure and measurement
World Book, 1957
 Buku Klasik