Cita APA (7a ed.)

Xu, G., & Xu, J. (2013). Orbits: 2nd Order Singularity-free Solutions (2nd ed. 2013.). Springer Berlin Heidelberg : Imprint: Springer.

Cita Chicago Style (17a ed.)

Xu, Guochang, y Jia Xu. Orbits: 2nd Order Singularity-free Solutions. 2nd ed. 2013. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2013.

Cita MLA (8a ed.)

Xu, Guochang, y Jia Xu. Orbits: 2nd Order Singularity-free Solutions. 2nd ed. 2013. Springer Berlin Heidelberg : Imprint: Springer, 2013.