African Regional Road Congress Salisbury, Zimbabwe. (1957). Proceedings of African Regional Road Congress. International Road Federation.
Citação do estilo Chicago (17ª ed.)African Regional Road Congress Salisbury, Zimbabwe. Proceedings of African Regional Road Congress. London: International Road Federation, 1957.
Citação MLA (8ª ed.)African Regional Road Congress Salisbury, Zimbabwe. Proceedings of African Regional Road Congress. International Road Federation, 1957.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.