Não informado. (2001). Annual Report of the Secretary of the State Horticultural Society of Michigan. Michigan Horticultural Society.
Citação do estilo Chicago (17ª ed.)Não informado. Annual Report of the Secretary of the State Horticultural Society of Michigan. Lansing, Mich: Michigan Horticultural Society, 2001.
Citação MLA (8ª ed.)Não informado. Annual Report of the Secretary of the State Horticultural Society of Michigan. Michigan Horticultural Society, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.