Citazione Stile APA (7a Edizione)

Gottlob, G., Kappel, G., & Schrefl, M. (1995). The Evolving Algebra Semantics of Class and Role Hierarchies. Springer.

Citazione stile Chigago Style (17a edizione)

Gottlob, G., G. Kappel, e M. Schrefl. The Evolving Algebra Semantics of Class and Role Hierarchies. Springer, 1995.

Citatione MLA (9a ed.)

Gottlob, G., et al. The Evolving Algebra Semantics of Class and Role Hierarchies. Springer, 1995.