Παραπομπή σε μορφή APA (7η εκδ.)
(1948). Colorado. A guide to the highest state: Compiled by workers of the writers' program of the work projects administration in the state of Colorado. Hastings House.
Παραπομπή σε μορφή Chicago (17η εκδ.)
Colorado. A Guide to the Highest State: Compiled by Workers of the Writers' Program of the Work Projects Administration in the State of Colorado. New York: Hastings House, 1948.
Παραπομπή σε μορφή MLA (9th εκδ.)
Colorado. A Guide to the Highest State: Compiled by Workers of the Writers' Program of the Work Projects Administration in the State of Colorado. Hastings House, 1948.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.