Cita APA (7a ed.)
Legget, R. F. Geology and Engineering. McGraw-Hill.
Cita estilo Chicago (17a ed.)
Legget, Robert F. Geology and Engineering. Nueva York, EUA: McGraw-Hill.
Cita MLA (9a ed.)
Legget, Robert F. Geology and Engineering. McGraw-Hill.
Precaución: Estas citas no son 100% exactas.