Cita APA (7a ed.)

Heron, D. W., & Machlup, F. (1977). More on "The Production and Distribution of Knowledge in the United States." Short Shoelaces: Machlup Looks at Library Statistics.

Cita Chicago Style (17a ed.)

Heron, David W., y Fritz Machlup. More on "The Production and Distribution of Knowledge in the United States." Short Shoelaces: Machlup Looks at Library Statistics. 1977.

Cita MLA (9a ed.)

Heron, David W., y Fritz Machlup. More on "The Production and Distribution of Knowledge in the United States." Short Shoelaces: Machlup Looks at Library Statistics. 1977.