APA
Mercer D., . (1998). Marketing strategy : the challenge of the external enviornment. Sage: London.
Chicago
Mercer David, . 1998. Marketing strategy : the challenge of the external enviornment. Sage: London.
Harvard
Mercer D., . (1998). Marketing strategy : the challenge of the external enviornment. Sage: London.
MLA
Mercer David, . Marketing strategy : the challenge of the external enviornment. Sage: London. 1998.