British Standards Institution. (1968). Specification for fine pitch gears. British Standards Institution.
Cita Chicago (17th ed.)British Standards Institution. Specification for Fine Pitch Gears. London: British Standards Institution, 1968.
Cita MLA (8th ed.)British Standards Institution. Specification for Fine Pitch Gears. British Standards Institution, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.