The basics of successful salesmanship: a self-teaching programmed book

Xehetasun bibliografikoak
Egile nagusia:	Thompson, Willard Mead
Formatua:	Liburua
Hizkuntza:	English
Argitaratua:	New York McGraw-Hill [c1968]
Gaiak:	Salesmen and salesmanship > Programmed instruction.