Não informado. (2001). Annual Report of the Secretary of the State Horticultural Society of Michigan. Michigan Horticultural Society.
Chicago-Zitierstil (17. Ausg.)Não informado. Annual Report of the Secretary of the State Horticultural Society of Michigan. Lansing, Mich: Michigan Horticultural Society, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Annual Report of the Secretary of the State Horticultural Society of Michigan. Michigan Horticultural Society, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.