APA

Mercer D., Barratt R., . (1992). Managing the external environment: a strategic perspective. : Sage in association with the Open University.

Chicago

Mercer David, Barratt Rod, . 1992. Managing the external environment: a strategic perspective. : Sage in association with the Open University.

Harvard

Mercer D., Barratt R., . (1992). Managing the external environment: a strategic perspective. : Sage in association with the Open University.

MLA

Mercer David, Barratt Rod, . Managing the external environment: a strategic perspective. : Sage in association with the Open University. 1992.