Cita APA (7th ed.)
Nazaĭkinskiĭ, V. E., Shatalov, V. E., & Sternin, B. I. (1992). Contact geometry and linear differential equations. W. de Gruyter.
Cita Chicago (17th ed.)
Nazaĭkinskiĭ, V. E., V. E. Shatalov, i B. I͡U Sternin. Contact Geometry and Linear Differential Equations. Berlin ; New York: W. de Gruyter, 1992.
Cita MLA (9th ed.)
Nazaĭkinskiĭ, V. E., et al. Contact Geometry and Linear Differential Equations. W. de Gruyter, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.