Gilbertson, H. W. (1948). Educational exhibits: How to prepare and use them; a manual for extension workers. U.S. Govt. Print. Off..
Citace podle Chicago (17th ed.)Gilbertson, Henry Walter. Educational Exhibits: How to Prepare and Use Them; a Manual for Extension Workers. Washington: U.S. Govt. Print. Off., 1948.
Citace podle MLA (8th ed.)Gilbertson, Henry Walter. Educational Exhibits: How to Prepare and Use Them; a Manual for Extension Workers. U.S. Govt. Print. Off., 1948.
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