MLA

Fehr, Hans, and Robert M Kunz. The Challenge of Life : Biomedical Progress and Human Values. Basel: Birkhäuser, 1972.

APA

Fehr, H., & Kunz, R. M. (1972). The challenge of life : biomedical progress and human values. Basel: Birkhäuser.

Chicago

Fehr, Hans, ed., and Robert M Kunz ed. The Challenge of Life: Biomedical Progress and Human Values. Basel: Birkhäuser, 1972.