Pasaribu, Sriyanthi, author
Fakultas Psikologi Universitas Indonesia, 2021
UI - Tesis (Membership)
edited and with introductory notes by Ira M. Robinson
Sage, Beverly Hills
Buku Teks
Hymans, Saul H., author
Prentice-Hall, 1967
Buku Teks
I Putu Aditya W., author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2017
UI - Skripsi (Membership)
Greenwood, William T., author
South-Western, 1969
Buku Teks