Cita APA

Kehl, G. L., & Kehl, G. L. (1949). The principles of metallorgraphic laboratory practice (3. edition.). New York, New York: McGraw-Hill.

Citación estilo Chicago

Kehl, George Louis, y George Louis Kehl. The Principles of Metallorgraphic Laboratory Practice. 3. edition. New York, New York: McGraw-Hill, 1949.

Cita MLA

Kehl, George Louis, y George Louis Kehl. The Principles of Metallorgraphic Laboratory Practice. 3. edition. New York, New York: McGraw-Hill, 1949.