Yekyong Publishing, 2002
Buku Referensi
Roberts, Lawrence P., author
Weatherhill, 1976
Buku Referensi
Burnier, Raymond, photographer
La Palme, 1950
Buku Referensi
Pit, M.A.
Van Rijkom Freres, [t.th.]
Buku Referensi
Molesworth, H.D.
Praeger, 1963
Buku Teks