Cita APA (7a ed.)

Alexander, L. G., & Grant, D. G. (1990). Detectives from Scotland Yard (New impression 1990.). Longman Group Limited.

Cita Chicago Style (17a ed.)

Alexander, L. G., y D. G. Grant. Detectives from Scotland Yard. New impression 1990. Harlow: Longman Group Limited, 1990.

Cita MLA (9a ed.)

Alexander, L. G., y D. G. Grant. Detectives from Scotland Yard. New impression 1990. Longman Group Limited, 1990.