Cita APA (7th ed.)

Colwill, D. M., & Hickman, A. J. (1981). Measurement of particulate lead on the M4 motorway at Harlington, Middlesex: Third report. Transport and Road Research Laboratory.

Cita Chicago (17th ed.)

Colwill, D. M., i A. J. Hickman. Measurement of Particulate Lead on the M4 Motorway at Harlington, Middlesex: Third Report. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.

Cita MLA (9th ed.)

Colwill, D. M., i A. J. Hickman. Measurement of Particulate Lead on the M4 Motorway at Harlington, Middlesex: Third Report. Transport and Road Research Laboratory, 1981.