APA-referens

Birkhoff, G., & Birkhoff, G. R. (1969). Ordinary differential equations.-2nd ed (2nd ed.). John wiley & Sons.

Chicago-stil citat

Birkhoff, Garrett, och Garrett,; Rota Birkhoff. Ordinary Differential Equations.-2nd Ed. 2nd ed. New York: John wiley & Sons, 1969.

MLA-referens

Birkhoff, Garrett, och Garrett,; Rota Birkhoff. Ordinary Differential Equations.-2nd Ed. 2nd ed. John wiley & Sons, 1969.