Abbott, P. (1956). Elementary Differential Equations. English Universities Press.
Citazione stile Chigago Style (17a edizione)Abbott, P. Elementary Differential Equations. London: English Universities Press, 1956.
Citatione MLA (9a ed.)Abbott, P. Elementary Differential Equations. English Universities Press, 1956.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.