Cita APA (7a ed.)

Metcalfe, J. S., & Steedman, I. (1981). On the transformation of theorems. [s.n.].

Cita Chicago Style (17a ed.)

Metcalfe, J. S., y Ian Steedman. On the Transformation of Theorems. [S.l.]: [s.n.], 1981.

Cita MLA (9a ed.)

Metcalfe, J. S., y Ian Steedman. On the Transformation of Theorems. [s.n.], 1981.