APA
Ferrell O. a. O., .Marketing Strategy. New Delhi: Academic Faundation.
Chicago
Ferrell O.C and Others, .Marketing Strategy. New Delhi: Academic Faundation.
Harvard
Ferrell O. a. O., .Marketing Strategy. New Delhi: Academic Faundation.
MLA
Ferrell O.C and Others, .New Delhi: Academic Faundation. .