APA

Nauheim F., . (1982). Letter perfect: how to write business letters that work. New York: Van Nostrand Reinhold.

Chicago

Nauheim Ferd, . 1982. Letter perfect: how to write business letters that work. New York: Van Nostrand Reinhold.

Harvard

Nauheim F., . (1982). Letter perfect: how to write business letters that work. New York: Van Nostrand Reinhold.

MLA

Nauheim Ferd, . Letter perfect: how to write business letters that work. New York: Van Nostrand Reinhold. 1982.