APA (7e ed.) Bronvermelding

Richards, J. W. (1906). Metallurgical calculations. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Richards, Joseph William. Metallurgical Calculations. New York: McGraw-Hill, 1906.

MLA (9e ed.) Bronvermelding

Richards, Joseph William. Metallurgical Calculations. McGraw-Hill, 1906.