Sloan, J. P. (1991). Ponderosa and lodgepole pine seedling bud burst varies with lift date and cultural practices in Idaho nursery. Intermountain Research Station.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sloan, John P. Ponderosa and Lodgepole Pine Seedling Bud Burst Varies with Lift Date and Cultural Practices in Idaho Nursery. Ogden, Utah, USA: Intermountain Research Station, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Sloan, John P. Ponderosa and Lodgepole Pine Seedling Bud Burst Varies with Lift Date and Cultural Practices in Idaho Nursery. Intermountain Research Station, 1991.
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