APA
United Nations Centre for Human Settlements, . (1991). Comparative modal efficiencies in urban transport, with reference to developing Countries. Nairobi: UNCHS (Habitat).
Chicago
United Nations Centre for Human Settlements, . 1991. Comparative modal efficiencies in urban transport, with reference to developing Countries. Nairobi: UNCHS (Habitat).
Harvard
United Nations Centre for Human Settlements, . (1991). Comparative modal efficiencies in urban transport, with reference to developing Countries. Nairobi: UNCHS (Habitat).
MLA
United Nations Centre for Human Settlements, . Comparative modal efficiencies in urban transport, with reference to developing Countries. Nairobi: UNCHS (Habitat). 1991.