Du Plessis, J. (2009). The definitive guide to point and figure: A comprehensive guide to the theory and practical use of the point and figure charting method; over 300 charts in full colour (Repr.). Harriman House Publ.
Chicago-Zitierstil (17. Ausg.)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; over 300 Charts in Full Colour. Repr. Petersfield: Harriman House Publ, 2009.
MLA-Zitierstil (9. Ausg.)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; over 300 Charts in Full Colour. Repr. Harriman House Publ, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.