Twidale, C. R. (1982). Granite landforms. Elsevier.
Cita Chicago (17th ed.)Twidale, C. R. Granite Landforms. Amsterdam: Elsevier, 1982.
Cita MLA (9th ed.)Twidale, C. R. Granite Landforms. Elsevier, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.