APA (7th ed.) Citation

Balcombe, R. J., Astrop, A. J., & Hill, E. (1998). Concessionary fares: Trip generation among elderly passengers. Transport Research Laboratory.

Chicago Style (17th ed.) Citation

Balcombe, R. J., A. J. Astrop, and E. Hill. Concessionary Fares: Trip Generation Among Elderly Passengers. Crowthorne, Berkshire: Transport Research Laboratory, 1998.

MLA (9th ed.) Citation

Balcombe, R. J., et al. Concessionary Fares: Trip Generation Among Elderly Passengers. Transport Research Laboratory, 1998.