Cita APA (7a ed.)

Sin autor & Bolc, L. (1984). Natural language communication with pictorial information systems. [S.n.].

Cita Chicago Style (17a ed.)

Sin autor y Leonard Bolc. Natural Language Communication with Pictorial Information Systems. Berlín: [S.n.], 1984.

Cita MLA (9a ed.)

Sin autor y Leonard Bolc. Natural Language Communication with Pictorial Information Systems. [S.n.], 1984.