APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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