(1970). Research and development in industry 1969: Funds, 1969, scientists and engineers, January 1970 ([1. vyd.].). Department of Commerce.
Citace podle Chicago (17th ed.)Research and Development in Industry 1969: Funds, 1969, Scientists and Engineers, January 1970. [1. vyd.]. Washington: Department of Commerce, 1970.
Citace podle MLA (9th ed.)Research and Development in Industry 1969: Funds, 1969, Scientists and Engineers, January 1970. [1. vyd.]. Department of Commerce, 1970.
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