Hollingsworth, D. (1954). Rocks in the roadway; a treatise on police public relations, by a police officer, for police officers. s.n.
Citace podle Chicago (17th ed.)Hollingsworth, Dan. Rocks in the Roadway; a Treatise on Police Public Relations, by a Police Officer, for Police Officers. Chicago: s.n, 1954.
Citace podle MLA (9th ed.)Hollingsworth, Dan. Rocks in the Roadway; a Treatise on Police Public Relations, by a Police Officer, for Police Officers. s.n, 1954.
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