Cita APA (7th ed.)
Barnard, S. (1903). A new geometry for schools (1a. ed.). Macmillan.
Cita Chicago (17th ed.)
Barnard, S. A New Geometry for Schools. 1a. ed. New York: Macmillan, 1903.
Cita MLA (9th ed.)
Barnard, S. A New Geometry for Schools. 1a. ed. Macmillan, 1903.
Atenció: Aquestes cites poden no estar 100% correctes.