Dear Mr. Architect:
[an open letter from the school librarian] ...
APA Citation
American Association of School Librarians. Committee on Planning School Library Quarters. (1946). Dear Mr. Architect: [an open letter from the school librarian] ... [Chicago].
MLA Citation
American Association of School Librarians. Committee on Planning School Library Quarters. Dear Mr. Architect: [an Open Letter From the School Librarian] ... [Chicago], 1946.
Warning: These citations may not always be complete (especially for serials).