APA
Tull D. S. &. H. D. I., . (2000). Marketing research. Prentice-Hall, New Delhi: .
Chicago
Tull Donald S & Hawkins Del I, . 2000. Marketing research. Prentice-Hall, New Delhi: .
Harvard
Tull D. S. &. H. D. I., . (2000). Marketing research. Prentice-Hall, New Delhi: .
MLA
Tull Donald S & Hawkins Del I, . Marketing research. Prentice-Hall, New Delhi: . 2000.