Παραπομπή APA

(1961). Planning 1961: Selected papers from the ASPO National Planning Conference Denver, Colorado April 30-May 4, 1961. Chicago: American Society of Planning Officials.

Παραπομπή Chicago Style

Planning 1961: Selected Papers From the ASPO National Planning Conference Denver, Colorado April 30-May 4, 1961. Chicago: American Society of Planning Officials, 1961.

Παραπομπή MLA

Planning 1961: Selected Papers From the ASPO National Planning Conference Denver, Colorado April 30-May 4, 1961. Chicago: American Society of Planning Officials, 1961.

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