APA সাইটেশন

Christopher, M. (1972). Marketing below-the-line. George allen and Unwin.

শিকাগো স্টাইলে সাইটেশন

Christopher, Martin. Marketing Below-the-line. london: George allen and Unwin, 1972.

এমএলএ সাইটেশন

Christopher, Martin. Marketing Below-the-line. George allen and Unwin, 1972.