Παραπομπή σε μορφή APA (7η εκδ.)

Urban, D. J., & Cook, N. J. (1986). Hazard evaluation division standard evaluation procedure: Ecological risk assessment. Office of Presticide Programs.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Urban, Douglas J., και Norman J. Cook. Hazard Evaluation Division Standard Evaluation Procedure: Ecological Risk Assessment. Washington: Office of Presticide Programs, 1986.

Παραπομπή σε μορφή MLA (9th εκδ.)

Urban, Douglas J., και Norman J. Cook. Hazard Evaluation Division Standard Evaluation Procedure: Ecological Risk Assessment. Office of Presticide Programs, 1986.