Cita APA (7a ed.)

Hoffman, J. A., & Freebairn, I. (1992). Blue print one.

Cita Chicago Style (17a ed.)

Hoffman, José A.J, y Ingrid Freebairn. Blue Print One. Longman, 1992.

Cita MLA (8a ed.)

Hoffman, José A.J, y Ingrid Freebairn. Blue Print One. 1992.