APA

Barnard C., . (1938). The functions of the excutive. Estados Unidos: Harvard University Press.

Chicago

Barnard Chester, . 1938. The functions of the excutive. Estados Unidos: Harvard University Press.

Harvard

Barnard C., . (1938). The functions of the excutive. Estados Unidos: Harvard University Press.

MLA

Barnard Chester, . The functions of the excutive. Estados Unidos: Harvard University Press. 1938.