APA aipamena

Clarkson, K. W. (1977). Intangible capital and rates of return: Effects of research and promotion on profitability. American Enterprise Institute for Public Policy Research.

Chicago Style aipamena

Clarkson, Kenneth W. Intangible Capital and Rates of Return: Effects of Research and Promotion on Profitability. Washington: American Enterprise Institute for Public Policy Research, 1977.

MLA aipamena

Clarkson, Kenneth W. Intangible Capital and Rates of Return: Effects of Research and Promotion on Profitability. American Enterprise Institute for Public Policy Research, 1977.