Cita APA (7a ed.)
Bell, F. Engineering Properties of Soils and Rocks. Butterworth.
Cita estilo Chicago (17a ed.)
Bell, F.G. Engineering Properties of Soils and Rocks. Londres, Inglaterra: Butterworth.
Cita MLA (9a ed.)
Bell, F.G. Engineering Properties of Soils and Rocks. Butterworth.
Precaución: Estas citas no son 100% exactas.