Riso, Don Richard
Discovering your personality yype: the new enneagram questionnaire
Houghton Miffiln, 1995
 Buku Teks SO
Riso, Don Richard
Understanding the enneagram the practical guide to personality types
Houghton Mifflin, 2000
 Buku Teks SO
Mary, Leena
Searching speech databases: Features, techniques and evaluation measures
Springer Cham, 2019
 eBooks
Crane, Rebecca, 1964-
Mindfulness-based cognitive therapy: distinctive features
Routledge, Taylor & Francis Group, 2017
 Buku Teks SO
Dian Kurniasih Wahyu Sari
Penggunaan metode diskusi kelompok berdasarkan tipe kepribadian dan kemahiran berbicara dalam pengajaran kemahiran berbicara = The use of group discussion based on personality type and student speaking skills in teaching speaking
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2018
 UI - Tesis Membership