Ripley, H. (1983). Police Forces of Great Britan and Ireland: Their amalgamations and their buttons / by Howard Ripley. Hazel.
Παραπομπή σε μορφή Chicago (17η εκδ.)Ripley, Howard. Police Forces of Great Britan and Ireland: Their Amalgamations and Their Buttons / by Howard Ripley. Oxfordshire: Hazel, 1983.
Παραπομπή σε μορφή MLA (8th εκδ.)Ripley, Howard. Police Forces of Great Britan and Ireland: Their Amalgamations and Their Buttons / by Howard Ripley. Hazel, 1983.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.