Cita APA (7a ed.)

Craven, T. L. Some observations on boolean algebra. [s.n.].

Cita Chicago Style (17a ed.)

Craven, T. L. Some Observations on Boolean Algebra. [s.l.]: [s.n.].

Cita MLA (8a ed.)

Craven, T. L. Some Observations on Boolean Algebra. [s.n.].