Citace podle APA

Whiting, P. H. (1964). Five great problems of salesmen and how to solve them. McGraw Hill.

Styl Chicago

Whiting, Percy H. Five Great Problems of Salesmen and How to Solve Them. New York: McGraw Hill, 1964.

Citace podle MLA

Whiting, Percy H. Five Great Problems of Salesmen and How to Solve Them. McGraw Hill, 1964.

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