Παραπομπή APA

(1970). National Trust for Historic Preservation: Annual report. Washington, D.C.: [National Trust for Historic Preservation.

Παραπομπή Chicago Style

National Trust for Historic Preservation: Annual Report. Washington, D.C.: [National Trust for Historic Preservation, 1970.

Παραπομπή MLA

National Trust for Historic Preservation: Annual Report. Washington, D.C.: [National Trust for Historic Preservation, 1970.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.