Masrulloh, author
2017
UI - Tesis (Membership)
Dev Raj
CBS Publishers and Distributors, 1985
Buku Teks
Harahap, Aldine Andriza, author
Universitas Indonesia, 2015
UI - Tesis (Membership)
by Adam Roy [and others]
Bowker-Saur, 1993
Buku Teks
Roy Berridge, author
2012
UI - Tesis (Open)