APA-viite (7. p.)

Erugin, N. P. (1966). Linear systems of ordinary differential equations with periodic and quasi-periodic coefficients. Academic Press.

Chicago-viite (17. p.)

Erugin, Nikolay P. Linear Systems of Ordinary Differential Equations with Periodic and Quasi-periodic Coefficients. Nueva York: Academic Press, 1966.

MLA-viite (9. p.)

Erugin, Nikolay P. Linear Systems of Ordinary Differential Equations with Periodic and Quasi-periodic Coefficients. Academic Press, 1966.