Παραπομπή APA

Fritz Machlup & Kenneth Lesson. (1978). Information Through the Printed Word.

Παραπομπή Chicago Style

Fritz Machlup & Kenneth Lesson. Information Through the Printed Word. Praeger Publications, New Delhi, 1978.

Παραπομπή MLA

Fritz Machlup & Kenneth Lesson. Information Through the Printed Word. 1978.