Cita APA (7th ed.)

Piaggio, H. T. H. (1920). An Elementary Treatise on Differential Equations and Their Applications. Modern Book Centre.

Cita Chicago (17th ed.)

Piaggio, H. T. H. An Elementary Treatise on Differential Equations and Their Applications. London: Modern Book Centre, 1920.

Cita MLA (9th ed.)

Piaggio, H. T. H. An Elementary Treatise on Differential Equations and Their Applications. Modern Book Centre, 1920.