Cita APA

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

Chicago Edition Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.