Beck, L. C. (1833). Botany of the northern and middle states, or, A description of the plants found in the United States, north of Virginia: Arranged according to the natural system, with a synopsis of the genera according to the Linnaean system--a sketch of the rudiments of botany, and a glossary of terms. Webster and Skinners.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Beck, Lewis C. Botany of the Northern and Middle States, or, A Description of the Plants Found in the United States, North of Virginia: Arranged According to the Natural System, with a Synopsis of the Genera According to the Linnaean System--a Sketch of the Rudiments of Botany, and a Glossary of Terms. Albany: Webster and Skinners, 1833.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Beck, Lewis C. Botany of the Northern and Middle States, or, A Description of the Plants Found in the United States, North of Virginia: Arranged According to the Natural System, with a Synopsis of the Genera According to the Linnaean System--a Sketch of the Rudiments of Botany, and a Glossary of Terms. Webster and Skinners, 1833.