Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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