Cita APA (7th ed.)

British Standards Institution. (1972). Specification for metric keys and keyways. British Standards Institution.

Cita Chicago (17th ed.)

British Standards Institution. Specification for Metric Keys and Keyways. London: British Standards Institution, 1972.

Cita MLA (8th ed.)

British Standards Institution. Specification for Metric Keys and Keyways. British Standards Institution, 1972.