Cita APA (7th ed.)
Lefferts, R. (1981). Elements of graphics: How to prepare charts and graphs for effective reports. Harper & Row.
Cita Chicago (17th ed.)
Lefferts, Robert. Elements of Graphics: How to Prepare Charts and Graphs for Effective Reports. New York ; London: Harper & Row, 1981.
Cita MLA (9th ed.)
Lefferts, Robert. Elements of Graphics: How to Prepare Charts and Graphs for Effective Reports. Harper & Row, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.