Não informado. (1935). Planning and Civic Comment. National Conference on State Parks.
Style de citation Chicago (17e éd.)Não informado. Planning and Civic Comment. Washington: National Conference on State Parks, 1935.
Style de citation MLA (8e éd.)Não informado. Planning and Civic Comment. National Conference on State Parks, 1935.
Attention : ces citations peuvent ne pas être correctes à 100%.