APA (7e ed.) Bronvermelding

Day, R. W. (2001). Soil testing manualprocedures, classiffication data, and sampling practices. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Day, Robert W. Soil Testing Manualprocedures, Classiffication Data, and Sampling Practices. McGraw-Hill, 2001.

MLA (8e ed.) Bronvermelding

Day, Robert W. Soil Testing Manualprocedures, Classiffication Data, and Sampling Practices. McGraw-Hill, 2001.

Let op: Deze citaties zijn niet altijd 100% accuraat.