APA (7th ed.) Citation

Geach, P. T. (1991). Logic and ethics. Nijhoff international philosophy series.

Chicago Style (17th ed.) Citation

Geach, P. T. "Logic and Ethics." Nijhoff International Philosophy Series 1991.

MLA (8th ed.) Citation

Geach, P. T. "Logic and Ethics." Nijhoff International Philosophy Series, 1991.

Warning: These citations may not always be 100% accurate.