Tohutoro APA (7th ed.)

Helfferich, F. (1962). Ion exchange. McGraw-Hill.

Tohutoru Kātū Chicago (17th ed.)

Helfferich, Friedrich. Ion Exchange. New York: McGraw-Hill, 1962.

Tohutoro MLA (9th ed.)

Helfferich, Friedrich. Ion Exchange. McGraw-Hill, 1962.