Armitage-Smith, S. (1904). John of Gaunt: King of Castile and Leon, Duke of Aquitaine and Lancaster, Earl of Derby, Lincoln and Leicester, Seneschal of England. A. Constable.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Armitage-Smith, Sydney. John of Gaunt: King of Castile and Leon, Duke of Aquitaine and Lancaster, Earl of Derby, Lincoln and Leicester, Seneschal of England. Westminister [London, England]: A. Constable, 1904.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Armitage-Smith, Sydney. John of Gaunt: King of Castile and Leon, Duke of Aquitaine and Lancaster, Earl of Derby, Lincoln and Leicester, Seneschal of England. A. Constable, 1904.
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