Παραπομπή APA

(1969). Proposed development plan: : Powells Planning area. Washington: Marcou O'Leary and Associates.

Παραπομπή Chicago Style

Proposed Development Plan: : Powells Planning Area. Washington: Marcou O'Leary and Associates, 1969.

Παραπομπή MLA

Proposed Development Plan: : Powells Planning Area. Washington: Marcou O'Leary and Associates, 1969.

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