Παραπομπή APA

USDA. (1997). fires: Fire information retrieval and evaluation system- a program for fire danger rating analysis. United states department of agriculture.

Παραπομπή Chicago Style

USDA. Fires: Fire Information Retrieval and Evaluation System- a Program for Fire Danger Rating Analysis. United states department of agriculture, 1997.

Παραπομπή MLA

USDA. Fires: Fire Information Retrieval and Evaluation System- a Program for Fire Danger Rating Analysis. United states department of agriculture, 1997.