APA (7th ed.) Citation

Massachusetts Horticultural Society, Horticultural Society of New York, & Pennsylvania Horticultural Society. Horticulture. Massachusetts Horticultural Society.

Chicago Style (17th ed.) Citation

Massachusetts Horticultural Society, Horticultural Society of New York, and Pennsylvania Horticultural Society. Horticulture. Boston: Massachusetts Horticultural Society.

MLA (8th ed.) Citation

Massachusetts Horticultural Society, et al. Horticulture. Massachusetts Horticultural Society.