Al-Uqshari, Yusuf
Kenali diri raih prestasi
Gema Insani, 2006
 Buku Teks SO
Wechsler, David
Range of human capacities
Williams & Wilkins, 1952
 Buku Teks SO
Lundin, Robert W.
Personality a behavioral analysis
Macmillan, 1969
 Buku Teks SO
Titiek Triwidodo
Pengembangan kepribadian sekretaris / Titiek Triwidodo
Gramedia Widiasarana Indonesia, 2004
 Buku Teks
Doi, Takeo
The anatomy of dependence / Takeo Doi.
Kodansha International, Ltd., 1985
 Buku Teks SO