Dyfyniad APA

Krajewski, L. J., & Ritzman, L. P. (2009). General environmental management. Pearson.

Dyfyniad Arddull Chicago

Krajewski, Lee J., and Larry P. Ritzman. General Environmental Management. New Delhi: Pearson, 2009.

Dyfyniad MLA

Krajewski, Lee J., and Larry P. Ritzman. General Environmental Management. Pearson, 2009.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.