APA aipamena

Crisp, R. D., & Day, G. S. (1957). Marketing research.

Chicago Style aipamena

Crisp, Richard D., and George S. Day. Marketing Research. 1957.

MLA aipamena

Crisp, Richard D., and George S. Day. Marketing Research. 1957.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.