Yalouris, Nikolas
England : Westerham Press, 1975
Buku Teks
Bernal, Ignacio
Dolphin Books, 1963
Buku Teks
Nanny Sri Lestari, author
University of Indonesia, Faculty of Humanities, 2004
Artikel Jurnal
Ward, Russel, author
Oxford University Press, 1964
Buku Teks
Palmer, Vance, author
Currey O'Neill, 1966
Buku Teks