Cita APA (7a ed.)

Langevin, P., & Biquard, P. (1969). Langevin. Seghers.

Cita Chicago Style (17a ed.)

Langevin, Paul, y Pierre Biquard. Langevin. Pairs: Seghers, 1969.

Cita MLA (9a ed.)

Langevin, Paul, y Pierre Biquard. Langevin. Seghers, 1969.