APA-referens (7:e uppl.)

Gottlob, G., Leone, N., & Veith, H. (1995). Second Order Logic and the Weak Exponential Hierarchies. Springer.

Chicago-referens (17:e uppl.)

Gottlob, G., N. Leone, och H. Veith. Second Order Logic and the Weak Exponential Hierarchies. Springer, 1995.

MLA-referens (9:e uppl.)

Gottlob, G., et al. Second Order Logic and the Weak Exponential Hierarchies. Springer, 1995.