Tilley, Andrew J., author
An introduction to research methodology and report writing in psychology
Pineapple Press, 2004
 Buku Teks
Sherine Kamila Hassan, author
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
Perancangan Skala Psikologi untuk Mengukur Impulsivitas = The Development of Psychology Scale to Measure Impulsiveness
Fakultas Psikologi Universitas Indonesia, 2015
 UI - Makalah dan Kertas Kerja
Test design: developments in psychology and psychometrics / editor, Susan E. Embretson
Academic Press, 1985
 Buku Teks
Problems in measuring change
edited by Chester W. Harris
University of Wisconcin Press , 1967
 Buku Teks
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