APA (7th ed.) Citation

Whiting, P. H. (1964). The five great problems of salesman and how to solve them. McGraw-Hill.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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