Cita APA (7th ed.)

Boyce, W. E. (1986). Elementary differential equations (4th.). Wiley & Sons.

Cita Chicago (17th ed.)

Boyce, William E. Elementary Differential Equations. 4th. USA: Wiley & Sons, 1986.

Cita MLA (9th ed.)

Boyce, William E. Elementary Differential Equations. 4th. Wiley & Sons, 1986.