Παραπομπή APA

Ehrig, R. (1992). Plastics recycling: : products and processes. Hanser.

Παραπομπή Chicago Style

Ehrig, R.J. Plastics Recycling: : Products and Processes. Munich: Hanser, 1992.

Παραπομπή MLA

Ehrig, R.J. Plastics Recycling: : Products and Processes. Hanser, 1992.