Lewis, J. P. (1969). An introduction to mathematics for students of economics. Macmillan.
Citazione stile Chigago Style (17a edizione)Lewis, John Parry. An Introduction to Mathematics for Students of Economics. London: Macmillan, 1969.
Citatione MLA (9a ed.)Lewis, John Parry. An Introduction to Mathematics for Students of Economics. Macmillan, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.