Citazione APA

Ehrlich, E. (1977). Theory and problems of punctuation, capitalization and spelling (5th ed.). McGraw-Hill.

Stile di citazione Chicago

Ehrlich, Eugene. Theory and Problems of Punctuation, Capitalization and Spelling. 5th ed. New York: McGraw-Hill, 1977.

Citazione MLA

Ehrlich, Eugene. Theory and Problems of Punctuation, Capitalization and Spelling. 5th ed. McGraw-Hill, 1977.