McNally, Rand, author
Rand McNally & Co, 1957
Buku Referensi
edited by Geoffrey Barraclough
Times Books, 1984
Buku Referensi
Boyd, Andrew, 1920-
Frederick A. Preaeger, 1957
Buku Teks
de Lange, Nicholas, author
Andromeda, 1992
Buku Referensi
Cribb, Robert, author
Nias Press/Det Kongelige Bibliotek, 2010
Buku Teks