Não informado. (1935). Planning and Civic Comment. National Conference on State Parks.
Chicago-viite (17. p.)Não informado. Planning and Civic Comment. Washington: National Conference on State Parks, 1935.
MLA-viite (8. p.)Não informado. Planning and Civic Comment. National Conference on State Parks, 1935.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.