Baerwald, D. A. (1968). A survey of planning information in standard reference books. Council of Planning Librarians.
Chicago-referens (17:e uppl.)Baerwald, Diane A. A Survey of Planning Information in Standard Reference Books. Monticello, Ill: Council of Planning Librarians, 1968.
MLA-referens (9:e uppl.)Baerwald, Diane A. A Survey of Planning Information in Standard Reference Books. Council of Planning Librarians, 1968.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.