Cita APA (7th ed.)

Firesmith, D., Henderson-Sellers, B., & Graham, I. S. (1998). OPEN modeling language OML: Reference manual. Cambridge University.

Cita Chicago (17th ed.)

Firesmith, Donald, Brian Henderson-Sellers, i Ian S. Graham. OPEN Modeling Language OML: Reference Manual. Cambridge: Cambridge University, 1998.

Cita MLA (9th ed.)

Firesmith, Donald, et al. OPEN Modeling Language OML: Reference Manual. Cambridge University, 1998.