APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Whiting, Percy H. The Five Great Problems of Salesmen and How to Solve Them. N.Y.: McGraw-Hill, 1964.

MLA (8th ed.) Citation

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