APA-referens

Buchi, J. R., & Siefkes, D. (1973). Monadic second order theory of all countable ordinals.

Chicago-stil citat

Buchi, J Richard, och Dirk Siefkes. Monadic Second Order Theory of All Countable Ordinals. Springer-Verlag, Berlin, 1973.

MLA-referens

Buchi, J Richard, och Dirk Siefkes. Monadic Second Order Theory of All Countable Ordinals. 1973.