APA aipamena

Cohan, S. M. (2006). Business principles of landscape contracting. New Jersey: Pearson.

Chicago Style aipamena

Cohan, Steven M. Business Principles of Landscape Contracting. New Jersey: Pearson, 2006.

MLA aipamena

Cohan, Steven M. Business Principles of Landscape Contracting. New Jersey: Pearson, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.