Browne, Elspeth
University of New South Wales, 1979
Buku Teks SO
Upton, Sydney
George Allen and Unwin, 1938
Buku Teks SO
Arps, Bernard
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2016
Artikel Jurnal
edited by Kate Darian-Smith, Liz Gunner and Sarah Nuttall
Routledge , 1996
Buku Teks SO
edited by Kate Darian-Smith, Liz Gunner and Sarah Nuttall
Routledge, 1996
Buku Teks SO