Massachusetts Horticultural Society, Horticultural Society of New York, & Pennsylvania Horticultural Society. Horticulture. Massachusetts Horticultural Society.
Chicago-viite (17. p.)Massachusetts Horticultural Society, Horticultural Society of New York, ja Pennsylvania Horticultural Society. Horticulture. Boston: Massachusetts Horticultural Society.
MLA-viite (8. p.)Massachusetts Horticultural Society, et al. Horticulture. Massachusetts Horticultural Society.
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