APA (7th ed.) Citation

Tough, J. M., & O'Flaherty, C. A. (1971). Passenger conveyors: An innovatory form of communal transport. Allen.

Chicago Style (17th ed.) Citation

Tough, John M., and Coleman A. O'Flaherty. Passenger Conveyors: An Innovatory Form of Communal Transport. London: Allen, 1971.

MLA (9th ed.) Citation

Tough, John M., and Coleman A. O'Flaherty. Passenger Conveyors: An Innovatory Form of Communal Transport. Allen, 1971.