APA

Melsen A. G. M. v., . (1967). Physical science and ethics: a reflection on the relationship between nature and morality. Pittsburgh: Duquesne University Press.

Chicago

Melsen Andrew Gerardus Maria van, . 1967. Physical science and ethics: a reflection on the relationship between nature and morality. Pittsburgh: Duquesne University Press.

Harvard

Melsen A. G. M. v., . (1967). Physical science and ethics: a reflection on the relationship between nature and morality. Pittsburgh: Duquesne University Press.

MLA

Melsen Andrew Gerardus Maria van, . Physical science and ethics: a reflection on the relationship between nature and morality. Pittsburgh: Duquesne University Press. 1967.