Montague-Smith, P. W. (1976). Debrett's correct form: An inclusive guide to everything from drafting wedding invitations to addressing an archbishop (Revised ed.). Debrett's Peerage Ltd [etc.] Distributed by Hamlyn.
Chicago Style (17th ed.) CitationMontague-Smith, Patrick Wykeham. Debrett's Correct Form: An Inclusive Guide to Everything from Drafting Wedding Invitations to Addressing an Archbishop. Revised ed. Kingston-upon-Thames London [etc.]: Debrett's Peerage Ltd [etc.] Distributed by Hamlyn, 1976.
MLA (9th ed.) CitationMontague-Smith, Patrick Wykeham. Debrett's Correct Form: An Inclusive Guide to Everything from Drafting Wedding Invitations to Addressing an Archbishop. Revised ed. Debrett's Peerage Ltd [etc.] Distributed by Hamlyn, 1976.
Warning: These citations may not always be 100% accurate.