Citazione APA

Welcher, F. J. (1975). Standard methods of chemical analysis (6th ed.). Robert E Krieger.

Stile di citazione Chicago

Welcher, Frank J. Standard Methods of Chemical Analysis. 6th ed. Hundtington, New York: Robert E Krieger, 1975.

Citazione MLA

Welcher, Frank J. Standard Methods of Chemical Analysis. 6th ed. Robert E Krieger, 1975.