Παραπομπή APA

Collier, J. R. (1968). Effective long range business planning. Prentice Hall.

Παραπομπή Chicago Style

Collier, James R. Effective Long Range Business Planning. New Jersey: Prentice Hall, 1968.

Παραπομπή MLA

Collier, James R. Effective Long Range Business Planning. Prentice Hall, 1968.