Cita APA (7a ed.)

Spencer-Brown, G. (1994). Laws of form (Limited ed.). Cognizer.

Cita Chicago Style (17a ed.)

Spencer-Brown, George. Laws of Form. Limited ed. Portland (Oregón): Cognizer, 1994.

Cita MLA (9a ed.)

Spencer-Brown, George. Laws of Form. Limited ed. Cognizer, 1994.