Print Club, Philadelphia, & Philadelphia Museum of Art. (1926). Memorial exhibition of the works of the late Joseph Pennell, held under the auspieces of the Philadelphia Print club and the Pennsylvania museum, in memorial hall, Fairmount park, Philadelphia, from October 1st to October 31st, 1926. Print Club of Philadelphia.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Print Club, Philadelphia, و Philadelphia Museum of Art. Memorial Exhibition of the Works of the Late Joseph Pennell, Held Under the Auspieces of the Philadelphia Print Club and the Pennsylvania Museum, in Memorial Hall, Fairmount Park, Philadelphia, from October 1st to October 31st, 1926. Philadelphia: Print Club of Philadelphia, 1926.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Print Club, Philadelphia, و Philadelphia Museum of Art. Memorial Exhibition of the Works of the Late Joseph Pennell, Held Under the Auspieces of the Philadelphia Print Club and the Pennsylvania Museum, in Memorial Hall, Fairmount Park, Philadelphia, from October 1st to October 31st, 1926. Print Club of Philadelphia, 1926.