APA

Transportation Research Record nr 635, . (1977). Price and subsidy in intercity transportation and issues of benefits and costs. Washington DC: Transportation Research Record nr 635.

Chicago

Transportation Research Record nr 635, . 1977. Price and subsidy in intercity transportation and issues of benefits and costs. Washington DC: Transportation Research Record nr 635.

Harvard

Transportation Research Record nr 635, . (1977). Price and subsidy in intercity transportation and issues of benefits and costs. Washington DC: Transportation Research Record nr 635.

MLA

Transportation Research Record nr 635, . Price and subsidy in intercity transportation and issues of benefits and costs. Washington DC: Transportation Research Record nr 635. 1977.