Cita APA (7a ed.)

Gowin, D. B. (1970). The structure of knowledge. [s.n.].

Cita Chicago Style (17a ed.)

Gowin, D. Bob. The Structure of Knowledge. [S.l.]: [s.n.], 1970.

Cita MLA (9a ed.)

Gowin, D. Bob. The Structure of Knowledge. [s.n.], 1970.