APA

Coffey P., . (1938). Ontology or The theory being. New York: Peter Smith.

Chicago

Coffey P, . 1938. Ontology or The theory being. New York: Peter Smith.

Harvard

Coffey P., . (1938). Ontology or The theory being. New York: Peter Smith.

MLA

Coffey P, . Ontology or The theory being. New York: Peter Smith. 1938.