APA aipamena

Tull, D. S. (1993). Marketing research (6.). Macmillan Press Ltd.

Chicago Style aipamena

Tull, Donald S. Marketing Research. 6. Canada: Macmillan Press Ltd, 1993.

MLA aipamena

Tull, Donald S. Marketing Research. 6. Macmillan Press Ltd, 1993.