APA (7th ed.) Citation

MacKinnon, C. R. (1966). The observer's book of heraldry. Frederick Warne.

Chicago Style (17th ed.) Citation

MacKinnon, Charles Roy. The Observer's Book of Heraldry. Londres: Frederick Warne, 1966.

MLA (9th ed.) Citation

MacKinnon, Charles Roy. The Observer's Book of Heraldry. Frederick Warne, 1966.