Bringhurst, Robert. The Elements of Typographic Style. 4th ed. (version 4.0), Hartley & Marks.
Hailstone, Max. ‘The National Grid #8’. The National Grid., pp. 82-87-90–95.
Hall, Stephen S. ‘I, Mercator’. You Are Here: Personal Geographies and Other Maps of the Imagination, 1st ed, Princeton Architectural Press, 2004, pp. 14–19.
Potter, Norman. ‘Chapter 1: What Is a Designer? And Chapter 2: Is a Designer an Artist?’ What Is a Designer: Things, Places, Messages, Rev. and Extended ed, Hyphen, 1980, pp. 10–20.