Bertin, L. (1961). Larousse encyclopedia of the earth: Norman Harris [and others. Translated by R. Bradshaw and Mary M. Owen from La terre, notre planáete]. P. Hamlyn.
Chicago-referens (17:e uppl.)Bertin, Lâeon. Larousse Encyclopedia of the Earth: Norman Harris [and Others. Translated by R. Bradshaw and Mary M. Owen from La Terre, Notre Planáete]. London: P. Hamlyn, 1961.
MLA-referens (9:e uppl.)Bertin, Lâeon. Larousse Encyclopedia of the Earth: Norman Harris [and Others. Translated by R. Bradshaw and Mary M. Owen from La Terre, Notre Planáete]. P. Hamlyn, 1961.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.