Philadelphia Society for Promoting Agriculture Collection (University of Pennsylvania), Pennsylvania Horticultural Society, & Hoffy, A. M. (1842). Hoffy's orchardist's companion, or, Fruits of the United States: A quarterly journal, devoted to the history, character, properties, modes of cultivation, and all other matters appertaining to the fruits of the United States, embellished with richly colored designs of the natural size, painted from the actual fruits. A. Hoffy.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philadelphia Society for Promoting Agriculture Collection (University of Pennsylvania), Pennsylvania Horticultural Society, و Alfred M. Hoffy. Hoffy's Orchardist's Companion, or, Fruits of the United States: A Quarterly Journal, Devoted to the History, Character, Properties, Modes of Cultivation, and All Other Matters Appertaining to the Fruits of the United States, Embellished with Richly Colored Designs of the Natural Size, Painted from the Actual Fruits. Philadelphia: A. Hoffy, 1842.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Philadelphia Society for Promoting Agriculture Collection (University of Pennsylvania), et al. Hoffy's Orchardist's Companion, or, Fruits of the United States: A Quarterly Journal, Devoted to the History, Character, Properties, Modes of Cultivation, and All Other Matters Appertaining to the Fruits of the United States, Embellished with Richly Colored Designs of the Natural Size, Painted from the Actual Fruits. A. Hoffy, 1842.