Παραπομπή σε μορφή APA (7η εκδ.)

Schnapf, L. P. (2003). Indoor air often poses greater hazards than outdoor air. Environmental Law Institute.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Schnapf, Lawrence P. Indoor Air Often Poses Greater Hazards than Outdoor Air. Washington, D.C.: Environmental Law Institute, 2003.

Παραπομπή σε μορφή MLA (9th εκδ.)

Schnapf, Lawrence P. Indoor Air Often Poses Greater Hazards than Outdoor Air. Environmental Law Institute, 2003.