Artikel Jurnal
Marcellus Simadibrata, author
University of Indonesia. Faculty of Medicine, 2017
Artikel Jurnal
Dochterman, Joanne M., author
Mosby, 2001
Buku Teks
Pervin, Lawrence A., author
John Wiley & Sons, 1984
Buku Teks
Chomsky, Noam, author
The Hague, 1970
Buku Teks