Cita APA (7a ed.)

Abell, D. F. (1980). Defining the business: The starting point of strategic planning. Prentice-Hall.

Cita Chicago Style (17a ed.)

Abell, Derek F. Defining the Business: The Starting Point of Strategic Planning. Englewood Cliffs (N.J.): Prentice-Hall, 1980.

Cita MLA (9a ed.)

Abell, Derek F. Defining the Business: The Starting Point of Strategic Planning. Prentice-Hall, 1980.