Παραπομπή APA

Pratt, A. (1978). Directory of Waste Disposal and Recovery. Geprge Godwin.

Παραπομπή Chicago Style

Pratt, Alan. Directory of Waste Disposal and Recovery. London: Geprge Godwin, 1978.

Παραπομπή MLA

Pratt, Alan. Directory of Waste Disposal and Recovery. Geprge Godwin, 1978.