APA

hubbard r., . (1991). The Management Series. COPENHAGEN: new ear publication internatioal.

Chicago

hubbard ron, . 1991. The Management Series. COPENHAGEN: new ear publication internatioal.

Harvard

hubbard r., . (1991). The Management Series. COPENHAGEN: new ear publication internatioal.

MLA

hubbard ron, . The Management Series. COPENHAGEN: new ear publication internatioal. 1991.