APA

Johansson H. G., . (1987). Study of literature on secondary and feeder roads in developing countries with particular reference to Africa. Linköping: Statens Väg- och Trafikinstitut.

Chicago

Johansson Hans G, . 1987. Study of literature on secondary and feeder roads in developing countries with particular reference to Africa. Linköping: Statens Väg- och Trafikinstitut.

Harvard

Johansson H. G., . (1987). Study of literature on secondary and feeder roads in developing countries with particular reference to Africa. Linköping: Statens Väg- och Trafikinstitut.

MLA

Johansson Hans G, . Study of literature on secondary and feeder roads in developing countries with particular reference to Africa. Linköping: Statens Väg- och Trafikinstitut. 1987.