Cita APA (7th ed.)

BELL, J. L., & BELL, J. L. a. S. (1969). Models and ultraproducts: An introduction. North-Holland.

Cita Chicago (17th ed.)

BELL, J. L., i J. L. and Slomson BELL. Models and Ultraproducts: An Introduction. Amsterdam: North-Holland, 1969.

Cita MLA (9th ed.)

BELL, J. L., i J. L. and Slomson BELL. Models and Ultraproducts: An Introduction. North-Holland, 1969.