APA

Schumpeter J. A., . (1951). Essays. Cambridge: Addison-Wesley Press.

Chicago

Schumpeter Joseph Alois, . 1951. Essays. Cambridge: Addison-Wesley Press.

Harvard

Schumpeter J. A., . (1951). Essays. Cambridge: Addison-Wesley Press.

MLA

Schumpeter Joseph Alois, . Essays. Cambridge: Addison-Wesley Press. 1951.