APA (7th ed.) Citation

Loring, L. M., & Popper, K. R. (1966). Two kinds of values. Routledge & K. Paul.

Chicago Style (17th ed.) Citation

Loring, L. M., and Karl R. Popper. Two Kinds of Values. London: Routledge & K. Paul, 1966.

MLA (9th ed.) Citation

Loring, L. M., and Karl R. Popper. Two Kinds of Values. Routledge & K. Paul, 1966.