Παραπομπή APA

Luck, D. J., & Day, G. S. (1974). Marketing Research (4.).

Παραπομπή Chicago Style

Luck, David J., και George S. Day. Marketing Research. 4. :, 1974.

Παραπομπή MLA

Luck, David J., και George S. Day. Marketing Research. 4. 1974.