Gaya APA

Abell, D, F. (1980). Defining The Business ; The Starting Point of Strategic Plonning (Ed.1). London: Prentice-Hall, INC..

Gaya MLA

Abell, Derek, F. "Defining The Business ; The Starting Point of Strategic Plonning". Ed.1 London: Prentice-Hall, INC., 1980. Text.