Cita APA (7th ed.)
Du Plessis, J. (2012). The definitive guide to point and figure: A comprehensive guide to the theory and practical use of the point and figure charting method (2nd ed.). Harriman House.
Cita Chicago (17th ed.)
Du Plessis, Jeremy. The Definitive Guide to Point and Figure: A Comprehensive Guide to the Theory and Practical Use of the Point and Figure Charting Method. 2nd ed. Petersfield, Hampshire: Harriman House, 2012.
Cita MLA (9th ed.)
Du Plessis, Jeremy. The Definitive Guide to Point and Figure: A Comprehensive Guide to the Theory and Practical Use of the Point and Figure Charting Method. 2nd ed. Harriman House, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.