Cita APA (7a ed.)

Arthur, W. B. (1990). Silicon Valley locational clusters: When do increasing returns imply monopoly? [s.n.].

Cita Chicago Style (17a ed.)

Arthur, W. Brian. Silicon Valley Locational Clusters: When Do Increasing Returns Imply Monopoly? [S.l.]: [s.n.], 1990.

Cita MLA (9a ed.)

Arthur, W. Brian. Silicon Valley Locational Clusters: When Do Increasing Returns Imply Monopoly? [s.n.], 1990.