Cita APA (7th ed.)

DeGrood, D. H. (1970). Philosophies of essence: An examination of the category of essence. Wolters-Noordhoff.

Cita Chicago (17th ed.)

DeGrood, David H. Philosophies of Essence: An Examination of the Category of Essence. Groningen: Wolters-Noordhoff, 1970.

Cita MLA (8th ed.)

DeGrood, David H. Philosophies of Essence: An Examination of the Category of Essence. Wolters-Noordhoff, 1970.