Cita APA (7a ed.)

Swan, P. L. (1973). The international diffusion of an innovation. [s.n.].

Cita Chicago Style (17a ed.)

Swan, Philip L. The International Diffusion of an Innovation. [S.l.]: [s.n.], 1973.

Cita MLA (9a ed.)

Swan, Philip L. The International Diffusion of an Innovation. [s.n.], 1973.