APA

Buckley E. A., . (1957). How to write better business letters: a practical, step-by-step discussion of the principles involved and the procedure to be followed in the preparation and dictation of successful letters. New York: McGraw-Hill.

Chicago

Buckley Earle A, . 1957. How to write better business letters: a practical, step-by-step discussion of the principles involved and the procedure to be followed in the preparation and dictation of successful letters. New York: McGraw-Hill.

Harvard

Buckley E. A., . (1957). How to write better business letters: a practical, step-by-step discussion of the principles involved and the procedure to be followed in the preparation and dictation of successful letters. New York: McGraw-Hill.

MLA

Buckley Earle A, . How to write better business letters: a practical, step-by-step discussion of the principles involved and the procedure to be followed in the preparation and dictation of successful letters. New York: McGraw-Hill. 1957.