Cita APA (7a ed.)

Whewell, W., & Butts, R. E. (1989). Theory of scientific method. Hackett.

Cita Chicago Style (17a ed.)

Whewell, William, y Robert E. Butts. Theory of Scientific Method. Indianapolis [etc.]: Hackett, 1989.

Cita MLA (9a ed.)

Whewell, William, y Robert E. Butts. Theory of Scientific Method. Hackett, 1989.